EIR Expansion Port

Expansion Connector K1

Pin GPIO Periph.
A Periph.
B Usage 1 PA0 PWM0 A0/NBS0 Available for external hardware, can permanently drive up to 16mA. 2 PA1 PWM1 A1/NBS1 3 PA2 PWM2 A2 4 PA3 TWD A3 I2C Bus to RTC, available for external I2C devices 5 PA4 TWCK A4 6 PA5 RXD0 A5 USART0 RS232 Rx/Tx via JP1 7 PA6 TXD0 A6 8 PA7 RTS0 A7 USART0 RS232 Hardware Handshake 9 PA8 CTS0 A8 10 PA9 DRXD A9 DBGU RS232 Rx/Tx via JP1 11 PA10 DTXD A10 12 PA11 NPCS0 A11 DataFlash Chip Select 13 PA12 MISO A12 SPI Bus to MP3 Decoder and DataFlash, available for external SPI devices 14 PA13 MOSI A13 15 PA14 SPCK A14 16 PA15 TF A15 MMC Chip Select 17 PA16 TK A16/BA0 MMC Clock 18 PA17 TD A17/BA1 MMC Command 19 PA18 RD NBS3/CFIOW MMC DAT0 20 PA19 RK NCS4/CFCS0 MMC DAT1 via R7 21 PA20 RF NCS2/CFCS1 MMC DAT2 via R8 and Ethernet Chip Select 22 PA21 RXD1 NCS6/CFCE2 Available for external hardware, e.g. 3rd UART 23 PA22 TXD1 NCS5/CFCE1 24 PA23 SCK1 NWR1/NBS1/CFIOR SDRAM DQMH 25 PA24 RTS1 SDA10 SDRAM A10 26 PA25 CTS1 SDCKE SDRAM CKE 27 PA26 DCD1 NCS1/SDCS SDRAM Chip Select 28 PA27 DTR1 SDWE SDRAM WE 29 PA28 DSR1 CAS SDRAM CAS 30 PA29 RI1 RAS SDRAM RAS 31 PA30 IRQ1 D30 MP3 Decoder Interrupt 32 PA31 NPCS1 D31 MP3 Decoder Command Select 33 Vref   A/D Converter Reference 34 3.3V   Regulated 3.3V Power Supply, up to 500mA are available for external hardware 35 AD4   Four Analog Inputs, available for external hardware 36 AD5   37 AD6   38 AD7   39 GND   Ground 40 GND  

Expansion Connector K2

Pin GPIO Periph.
A Periph.
B Note 1 PB0 TIOA0 A0/NBS0 SDRAM DQML 2 PB1 TIOB0 A1/NBS2 Available, but reserved for External Address Bus Bit 1 3 PB2 SCK0 A2 External Address Bus, Bits 2..11 4 PB3 NPCS3 A3 5 PB4 TCLK0 A4 6 PB5 NPCS3 A5 7 PB6 PCK0 A6 8 PB7 PWM3 A7 9 PB8 ADTRG A8 10 PB9 NPCS1 A9 11 PB10 NPCS2 A10 12 PB11 PWM0 A11 13 PB12 PWM1 A12 Available, but reserved for External Address Bus Bit 12 14 PB13 PWM2 A13 External Address Bus, Bits 13..14 15 PB14 PWM3 A14 16 PB15 TIOA1 A15 Available, but reserved for External Address Bus Bit 15 17 PB16 TIOB1 A16/BA0 SDRAM BA0 18 PB17 PCK1 A17/BA1 SDRAM BA1 19 PB18 PCK2 D16 Available for external hardware, e.g. programmable clock output 20 PB19 FIQ D17 RTC Interrupt via R35 21 PB20 IRQ0 D18 Ethernet Controller Interrupt 22 PB21 PCK1 D19 Available for external hardware, e.g. programmable clock output 23 PB22 NPCS3 D20 Available for external hardware, e.g. SPI chip select 24 PB23 PWM0 D21 USB Monitor 25 PB24 PWM1 D22 Available for external hardware, e.g. GPIO with timer/counter 26 PB25 PWM2 D23 27 PB26 TIOA2 D24 28 PB27 TIOB2 D25 29 PB28 TCLK1 D26 30 PB29 TCLK2 D27 31 PB30 NPCS2 D28 MP3 Decoder Data Select 32 PB31 PCK2 D9 MP3 Decoder Hardware Reset 33 3.3V   Regulated 3.3V Power Supply, up to 500mA are available for external hardware 34 3.3V   35   Not connected, reserved for future expansions 36   37   38 NRST   Hardware Reset, also available to reset external hardware 39 GND   Ground 40 GND  

Expansion Connector K3

Pin GPIO Periph.
A Periph.
B Note 1 PC0 D0   16-Bit External Data Bus 2 PC1 D1   3 PC2 D2   4 PC3 D3   5 PC4 D4   6 PC5 D5   7 PC6 D6   8 PC7 D7   9 PC8 D8 RTS1 10 PC9 D9 DTR1 11 PC10 D10 PCK0 12 PC11 D11 PCK1 13 PC12 D12 PCK2 14 PC13 D13   15 PC14 D14 NPCS1 16 PC15 D15 NCS3/NANDCS 17 PC16 A18 NWAIT Open Collector Bus Wait 18 PC17 A19 NANDOE Ethernet Controller Hardware Reset 19 PC18 A20 NANDWE MultiMedia Card Detect 20 PC19 A21/NANDALE   MultiMedia Card Write Protect Sensor 21 PC20 A22/REG/NANDCLE NCS7 Available for external hardware, e.g. chip select for memory mapped devices 22 PC21   NWR0/NWE/CFWE External Bus Write Strobe 23 PC22   NRD/CFOE External Bus Read Strobe 24 PC23 CFRNW NCS0 Available for external hardware, e.g. chip select for memory mapped devices 25   Not connected, can be used to route additional signals to external hardware 26   27   28   29   30   31   32   33 3.3V   Regulated 3.3V Power Supply, up to 500mA are available for external hardware 34 3.3V   35 JTAGSEL   Connect with pin 33 to enable boundary scan 36 ERASE   Connect with pin 34 to erase the firmware 37 Vin   Unregulated Input Voltage, 5-24V 38 SHDN   Connect with pin 40 to switch off the radio 39 GND   Ground 40 GND  

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