Hardware-Ben

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Contents

[edit] Overview

  • 3.0" 320x240 pixels colour TFT LCD (40x15 character in a text console)
  • 59 keys Keyboard
  • USB 2.0 High-Speed Device, Mini B connector
  • 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)

[edit] 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.
  • ...

[edit] 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 Ben_source_code#serial_console.

[edit] 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

[edit] 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 SHDN_HOST???
  • 18 TP23 (free)
  • 19 sdram dcs
  • 20 sdram ras
  • 21 sdram cas
  • 22  ???
  • 23 sdram cke
  • 24 sdram cko
  • 25 sdram cs1
  • 26 sdram cs2
  • 27 USB ID
  • 28  ???
  • 29 Audio output enable
  • 30 TP25 (free)
  • 31  ???

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 (unused)
  • 09 TP 36 (unused)
  • 10 keyboard out 0
  • 11 keyboard out 1
  • 12 keyboard out 2
  • 13 keyboard out 3
  • 14 keyboard out 4
  • 15 keyboard out 5
  • 16 keyboard out 6
  • 17 keyboard out 7
  • 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
  • 28 nand read enable
  • 29 nand write enable
  • 30 nand flash ready/busy
  • 31 select uart or jtag on pad 147; not a gpio pin

Port D:

  • 00 SD Card detect
  • 02 SD Card power enable
  • 04 Speaker AMP enable
  • 06 Shutdown detect
  • 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
  • 19 Keyboard in 2
  • 20 Keyboard in 3
  • 21 Keyboard in 4
  • 22 Keyboard in 5
  • 23 Keyboard in 6 (i2c?)
  • 24 Keyboard in 7 (i2c?)
  • 25 uart transmit
  • 26 Keyboard in 8 (uart receive)
  • 27 Buzzer, controlled with pwm4. Piezo-electric buzzer; not related to soundcard output.
  • 28 USB detect
  • 29 power button
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