Overview
JZ4720 336 MHz MIPS compatible processor from Ingenic Semiconductor Co.
3.0" 320x240 pixels [[LCD colour TFT LCD]] (40x15 character in a text console) 32MB [[SDRAM]]
2GB [[NAND NAND Flash]] Memory 1 [[SD microSDHC]] slot (SDIO capable) 59 keys Keyboard
Stereo headphones connector, mono speaker and microphone [[AudioINOUT audio interfaces]]. 3.7V 850mAh Li-ion Battery ( [[Compatible_batteries Compatible batteries]]) and 5V 500mA [[PowerSupplyCircuit DC input through USB port]] Measured battery life time, idle, screen off: 12h59
Overall dimension (lid closed): 99 * 75 * 17.5mm. (display: 7.5mm, keyboard: 10mm)
Weight: 126g (includes battery)
Status
- Flashing bootloader, kernel, and rootfs via USB works.
- Serial console via GND/RXD/TXD pads under the battery works.
- LCD works ** After a few minutes of inactivity on the console, it will go blank. Pressing any key brings it back.
- Keyboard works
- Audio/ALSA works.
- ...
Pinouts
PCB 08.50 (ben)
'''Micro-SD pins on testpads:'''
Pin TP note
#1 TP14 data2 #2 TP15 cd/data3 / _CS #3 TP17 cmd / mosi #4 sdVCC switched by Q4 (fet?) controlled via line from cpu (on TP11) #5 TP16 clock #6 GND #7 TP12 data0 / miso #8 TP13 data1
'''Serial pins:'''
See [[Bensourcecode#serial_console]].
== System information ==
$ '''cat /proc/cpuinfo'''
system type : JZ4740
processor : 0
cpu model : Ingenic JZRISC V4.15
BogoMIPS : 335.05
wait instruction : yes
microsecond timers : no
tlb_entries : 32
extra interrupt vector : yes
hardware watchpoint : yes, count: 1, address/irw mask: [0x0fff]
ASEs implemented :
shadow register sets : 1
core : 0
VCED exceptions : not available
VCEI exceptions : not available
$ '''cat /proc/mtd''' dev: size erasesize name mtd0: 00400000 00080000 "NAND BOOT partition" mtd1: 00400000 00080000 "NAND KERNEL partition" mtd2: 20000000 00080000 "NAND ROOTFS partition" mtd3: 5f800000 00080000 "NAND DATA partition"
$ '''uname -a''' Linux BenNanoNote 2.6.32.27 #1 PREEMPT Sat Mar 5 03:54:50 MSK 2011 mips GNU/Linux
$ '''cat /proc/iomem''' 00000000-01ffffff : System RAM 00010000-0031162b : Kernel code 0031162c-0040877f : Kernel data 10003000-10003037 : jz4740-rtc 10003000-10003037 : jz4740-rtc 10020000-10020037 : jz4740-i2s 10020000-10020037 : jz4740-i2s 10020080-10020087 : jz4740-codec 10020080-10020087 : jz4740-codec 10021000-10030fff : jz4740-mmc.0 10021000-10030fff : jz4740-mmc 10070000-10070030 : jz4740-adc 10070000-10070030 : jz4740-adc 13010000-1301ffff : jz4740-nand.0 13010000-1301ffff : jz4740-nand 13030000-1303ffff : jz-ohci.0 13040000-1304ffff : jz-udc 13040000-1304ffff : jz-udc 13050000-1305ffff : jz4740-fb 13050000-1305ffff : jz4740-fb
$ '''cat /proc/interrupts'''
CPU0
2: 33611 MIPS JZ4740 cascade interrupt
17: 20 INTC serial
20: 56 INTC jz4740-adc
22: 47 INTC MMC/SD
23: 0 INTC jz4740-rtc
28: 0 INTC DMA
31: 32374 INTC jz4740-timerirq
32: 527 INTC jz-udc
147: 0 GPIO Bank C jz4740-battery
152: 0 GPIO Bank D MMC/SD detect changed
170: 0 GPIO Bank D matrix-keypad
171: 94 GPIO Bank D matrix-keypad
172: 77 GPIO Bank D matrix-keypad
173: 17 GPIO Bank D matrix-keypad
174: 151 GPIO Bank D matrix-keypad
175: 13 GPIO Bank D matrix-keypad
176: 235 GPIO Bank D matrix-keypad
178: 0 GPIO Bank D matrix-keypad
180: 0 GPIO Bank D gpio-charger.0
181: 0 GPIO Bank D Power
ERR: 0
== GPIO pins ==
The Jz4720 has only a limited number of pins as outputs to the board. Furthermore, several functions take up gpio pins which are therefore not usable for other functions. Those devices are the sdram and nand controller, lcd controller and mmc+sd controller. Below is a table showing how they are used. Please complete this table. The missing entries are not connected to a pad in the Jz4720.
'''Port A:''' * 01 sdram data 0 * 03 sdram data 1 * 05 sdram data 2 * 07 sdram data 3 * 08 sdram data 4 * 09 sdram data 5 * 10 sdram data 6 * 11 sdram data 7 * 12 sdram data 8 * 13 sdram data 9 * 15 sdram data 10 * 17 sdram data 11 * 22 sdram data 12 * 26 sdram data 13 * 28 sdram data 14 * 30 sdram data 15
'''Port B:''' * 00 sdram address 0 * 01 sdram address 1 * 02 sdram address 2 * 03 sdram address 3 * 04 sdram address 4 * 05 sdram address 5 * 06 sdram address 6 * 07 sdram address 7 * 08 sdram address 8 * 09 sdram address 9 * 10 sdram address 10 * 11 sdram address 11 * 12 sdram address 12 * 13 sdram address 13 * 14 sdram address 14 * 15 nand command latch * 16 nand address latch * 17 not connected (was marked "SHDN_HOST???", but schematic disagrees) * 18 TP23 (free) * 19 sdram dcs * 20 sdram ras * 21 sdram cas * 22 sdram write enable * 23 sdram cke * 24 sdram cko * 25 sdram cs1 * 26 sdram cs2 * 27 not connected (was marked "USB ID", but schematic disagrees) * 28 not connected * 29 Audio output enable (anti-pop control) * 30 TP25 (free) * 31 sdram write enable 0
'''Port C:''' * 00 lcd data 0 * 01 lcd data 1 * 02 lcd data 2 * 03 lcd data 3 * 04 lcd data 4 * 05 lcd data 5 * 06 lcd data 6 * 07 lcd data 7 * 08 TP 35 (free) * 09 TP 36 (free) * 10 keyboard out 1, TP59 * 11 keyboard out 2, TP60 * 12 keyboard out 3, TP61 * 13 keyboard out 4, TP62 * 14 keyboard out 5, TP63 * 15 keyboard out 6, TP64 * 16 keyboard out 7, TP65 * 17 keyboard out 8, TP66 * 18 lcd pixel clock * 19 lcd hsync * 20 lcd vsync * 21 lcd SPI chipselect * 22 lcd SPI data * 23 lcd SPI clock * 24 sdram write enable 1 * 27 Charge detect (analog input to read battery voltage). * 28 nand read enable * 29 nand write enable * 30 nand flash ready/busy * 31 not connected to a pad; PCSEL31 selects jtag (PCSEL31==0) or uart0 (PCSEL31==1) on pad 147(TxD)+148(RxD) (TP5+TP4).
'''Port D:''' * 00 SD Card detect * 02 SD Card power enable * 04 Speaker AMP enable (no audio unless this output is pulled low). * 06 Low power indicator (if 0, battery power is low). * 08 SD Card command * 09 SD Card clock * 10 SD Card data 1 * 11 SD Card data 2 * 12 SD Card data 3 * 13 SD Card data 4 * 15 TP 38 (free) * 18 Keyboard in 1, TP67 * 19 Keyboard in 2, TP68 * 20 Keyboard in 3, TP69 * 21 Keyboard in 4, TP70 * 22 Keyboard in 5, TP71 * 23 Keyboard in 6, TP72 * 24 Keyboard in 7, TP73 * 25 uart0 transmit, TP75 * 26 Keyboard in 8 (uart0 receive), TP74 * 27 Buzzer, controlled with pwm4. Piezo-electric buzzer; not related to soundcard output. * 28 USB detect (0 if usb power is present). * 29 power button (0 if pressed).
=== Sorted by function === * buzzer: D27 * audio: B29, D4 * power button: D29 * keyboard: C10, C11, C12, C13, C14, C15, C16, C17, D18, D19, D20, D21, D22, D23, D24, D26(also uart receive) * uart: C31, D25, D26(also keyboard), uart is also available on jtag pads TP4+TP5 (without gpio overload). * sd/mmc: D0, D2, D8, D9, D10, D11, D12, D13 * usb: D28 * battery: C27, D6 * sdram: A1, A3, A5, A7, A8, A9, A10, A11, A12, A13, A15, A17, A22, A26, A28, A30, B0, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B19, B10, B21, B22, B23, B24, B25, B26, B31, C24 * nand: B15, B16, C28, C29, C30 * lcd: C0, C1, C2, C3, C4, C5, C6, C7, C18, C19, C20, C21, C22, C23 * only test points: B18, B30, C8, C9, D15 * unconnected pads: B17, B27, B28
[[Category:Ben NanoNote]]
This content is dual licensed under CC-BY-SA and GFDL and was obtained from http://en.qi-hardware.com/wiki/Hardware-Ben
