APF28

Description

The APF28 is a simple and low cost Single Board Computer targeted for small GUI, communication and control process.

Here is a list of the main features:

• Processor: i.MX28x (ARM9 @ 454MHz)
• RAM: DDR2 400. 64 to 512MB. 16 bits data bus. Default capacity is 128MB.
• Flash: NAND. 256MB to 4GB, 8 bits data bus. Default capacity is 256MB
• Ethernet: onboard Physical (ready to use Ethernet 10/100Mbit link)
• USB: High speed USB OTG (OnTheGo) with onboard Physical
• USB: 1 High speed Hosts with integrated PHY
• Touchscreen controler (4/5 wires)
• Low speed ADCs (up to 7)
• High speed ADC
• RTC and Watchdog
• Battery charger (Li-On/Li-Po)
• Supplies: high end DC/DC converters and LDOs on board. Only one external supply required (5V, batterie or 3.3V).
• Mechanical dimensions: ~43x25mm

All the i.MX28 peripherals (LCD, SDIO, SPI, 6xSerial, I2C, 2xUSB, PWM, etc...) can be accessed through two high density Hirose connectors.

Resources

• Datasheet and schema

Extension connectors

Default pin usage on the extension connectors J9 and J10 - Each functionality can be disabled by simply using "make linux-menuconfig" (implementation on-going)

• • Connector J9

J9 Pin	Function	J9 Pin	Function
1	3.3V	2	5V
3	SAIF0-SDATA0 / PWM6	4	GND
5	SAIF0-BITCLK / PWM5	6	SAIF1-SDATA0 / PWM7
7	SAIF0-LRCLK / PWM3	8	SAIF0-MCLK / PWM4
9	GND	10	GND
11	UART3_RX	12	UART2_RX
13	UART3_TX	14	UART2_TX
15	UART3_RTS	16	UART2_RTS
17	UART3_CTS	18	UART2_CTS
19	GND	20	GND
21	UART0_RX	22	GPIO
23	UART0_TX	24	GPIO
25	UART0_RTS	26	GPIO / PWM1
27	UART0_CTS	28	GPIO / PWM0
29	GND	30	GND
31	GPIO	32	CAN1_TX
33	GPIO	34	CAN1_RX
35	GPIO	36	GPIO
37	GND	38	GPIO
39	GND	40	GND

• • Connector J10

J10 Pin	Function	J10 Pin	Function
1	3.3V	2	5V
3	GPIO	4	VBAT
5	GPIO	6	GPIO
7	GPIO	8	GPIO
9	GPIO	10	GPIO
11	GND	12	GPIO
13	GND	14	SPI3_SCK
15	GND	16	SPI3_MOSI
17	GND	18	SPI3_MISO
19	SPI2_SCK	20	SPI3_SS0
21	SPI2_MOSI	22	GND
23	SPI2_MISO	24	SPDIF
25	SPI2_SS0	26	GPIO
27	GPIO	28	I2C0_SDA
29	GPIO	30	i2C0_SCL
31	3.3V	32	GND
33	GND	34	GND
35	LRADC6	36	LRADC1
37	HSADC	38	LRADC0
39	GND	40	GND

Feature list

• APF28_Linux_kernel_status

Video Out LCD BackLight FrameBuffer

Wired communication Uart SPI I2C USB_Host USB_Gadget Storage MultiMediaCard Other PWM: PWM output J2 pin 18 (2.8V output level if used) GPIO_Driver APF28_PMIC (Touchscreen, keypad, ADCs, Battery)