Micro2451

Introduction

Overview

Front

Back

The Micro2451 CPU board is an ARM9 embedded system that uses the Samsung's ARM926EJ S3C2451 System On Chip (SOC). Its clock is 400M Hz and can be up to 533MHz. As an ideal successor of the Mico2440 it has better performance and lower power consumption.

The Micro2451 CPU board's pin specifications are identical to the Micro2440 CPU board's and therefore they work with the same carrier board.

Features

• CPU: Samsung S3C2451,Running at 400Mhz
• RAM: 64M DDR2
• Flash: 256MB SLC NandFlash Default , 1GB Optional
• MicroSD x1：Boot and Storage
• MicroUSB x1：Power Supply Only
• LEDs x5：Power LED x1，User LEDs x4
• Reset Button
• 2.0mm Breakout Headers x3，Include:
  • UARTs x3
  • I2C x1
  • PWMs x4
  • USB 1.1 HOST x1
  • USB 2.0 Device x1
  • MMC/SDIO x1
  • IIS x1
  • ADCs x7
  • SROM Bus 25-bit Address, 16-bit Data and 5 Chip Select
  • RGB LCD 24-bit Interface x1
  • DVP Camera Interface x1
  • Configurable GPIOs or External Interrupts x22

Interfaces

Breakout Header Definitions

Micro2451-1506 Breakout

• P1

P1 Pin#	PCB Pin#	Name	P1 Pin#	PCB Pin#	Name
1	1	VDD_5V	2	2	DGND
3	3	EINT19/GPG11	4	4	EINT18/GPG10
5	5	EINT17/GPG9	6	6	EINT16/GPG8
7	7	EINT15/GPG7	8	8	EINT14/GPG6
9	9	EINT13/GPG5	10	10	EINT11/GPG3
11	11	EINT12/GPG4	12	12	EINT6/GPF6
13	13	EINT5/GPF5	14	14	EINT4/GPF4
15	15	EINT3/GPF3	16	16	EINT2/GPF2
17	17	EINT1/GPF1	18	18	EINT0/GPF0
19	19	GPL5	20	20	MMC0CLK
21	21	MMC0CMD	22	22	MMC0DATA2
23	23	MMC0DATA3	24	24	MMC0DATA0
25	25	MMC0DATA1	26	26	BOOT_CS
27	27	NC	28	28	M_nRESET
29	29	DM_UDEV	30	30	DP_UDEV
31	31	DM_UHOST	32	32	DP_UHOST
33	33	AIN2	34	34	RTC_BATT
35	35	AIN0	36	36	AIN1
37	37	TOUT2/GPB2	38	38	TOUT3/GPB3
39	39	TCLK/GPB4	40	40	IIS0LRCK
41	41	IIS0SCLK	42	42	IIS0CDCLK
43	43	IIS0SDI	44	44	IIS0SDO
45	45	TOUT0/GPB0	46	46	EINT10/GPG2
47	47	UART2_TX	48	48	UART2_RX
49	49	UART1_TX	50	50	UART1_RX
51	51	UART0_TX	52	52	UART0_RX
53	53	UART0_CTS	54	54	USRT0_RTS
55	55	I2C0SDA	56	56	I2C0SCL

• P2

P2 Pin#	PCB Pin#	Name	P2 Pin#	PCB Pin#	Name
1	57	AIN6/YM	2	58	AIN7/YP
3	59	AIN8/XM	4	60	AIN9/XP
5	61	LCD R-bit6	6	62	LCD R-bit7
7	63	LCD R-bit4	8	64	LCD R-bit5
9	65	LCD R-bit2	10	66	LCD R-bit3
11	67	LCD R-bit0	12	68	LCD R-bit1
13	69	LCD G-bit6	14	70	LCD G-bit7
15	71	LCD G-bit4	16	72	LCD G-bit5
17	73	LCD G-bit2	18	74	LCD G-bit3
19	75	LCD G-bit0	20	76	LCD G-bit1
21	77	LCD B-bit6	22	78	LCD B-bit7
23	79	LCD B-bit4	24	80	LCD B-bit5
25	81	LCD B-bit2	26	82	LCD B-bit3
27	83	LCD B-bit0	28	84	LCD B-bit1
29	85	TOUT1/GPB1	30	86	LCD DEN
31	87	LCD VSYNC	32	88	LCD HSYNC
33	89	LCD CLK	34	90	GPC0
35	91	Camera DATA7	36	92	Camera DATA6
37	93	Camera DATA5	38	94	Camera DATA4
39	95	Camera DATA3	40	96	Camera DATA2
41	97	Camera DATA1	42	98	Camera DATA0
43	99	Camera XCLK	44	100	Camera PCLK
45	101	Camera VSYNC	46	102	Camera HREF
47	103	EINT20/GPG12	48	104	GPJ12
49	105	VDD_5V	50	106	DGND

• P3

P3 Pin#	PCB Pin#	Name	P3 Pin#	PCB Pin#	Name
1	107	EINT7/GPF7	2	108	EINT9/GPG1
3	109	nRCS1/GPA12	4	110	nRCS3/GPA14
5	111	nRCS2/GPA13	6	112	nRCS5/GPA16
7	113	nRCS4/GPA15	8	114	nRWE
9	115	nROE	10	116	nRSTOUT
11	117	nWAIT	12	118	nXDACK0/GPB9
13	119	SROM ADDR0	14	120	nDREQ0/GPB10
15-38	121-144	SROM ADDR1-24
39-54	145-160	SROM DATA0-15
55	161	VDD_5V	56	162	DGND

Some Pin Descriptions:

1. VDD_5V: 4.7-5.6V power supply input. 5V/500mA is recommended.
2. BOOT_CS: Boot mode select signal input. When BOOT_CS is floating or high level, Micro2451 will boot from MicroSD card, otherwise boot from NandFlash. BOOT_CS is also connected to the boot mode switch. So, if you used BOOT_CS in your project, the boot mode switch should on SD side (BOOT_CS flaoting).
3. M_nRESET：Manual reset input, active low.
4. DM_UDEV&DP_UDEV：USB 2.0 Device
5. DM_UHOST&DP_UHOST: USB 1.1 Host. 15K pull-down resistors is necessary.
6. RTC_BATT：3V RTC backup battery input.
7. AIN0-AIN2,AIN6-AIN9：Input channels of S3C2451 SOC 12-Bit ADC. Channel 0-2,and channel 6-9, voltage input rang: 0-3.3V

Boot Mode Switch, MicroSD and MicroUSB

• Boot Mode Switch：On SD side, boot from MicroSD card. On NAND side, boot from NandFlash
• MicroSD：Boot and Storage.
• MicroUSB：Power supply only

Dimensions

More detail: Micro2451-1506-Dimensions(dxf).zip

Resources

• Schematic ( Micro2451-1506-Schematic.pdf )
• Dimensions ( Micro2451-1506-Dimensions(dxf).zip )
• S3C2451 Datasheet ( S3C2451_UM_REV1.10.pdf )