Hardware Firmware Tools Download Community

 

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

---

Return to the EIR project page.