Motorola MC9S12DB128B, MC9S12DT128B manual A.7.2 Slave Mode, Figure A-7 SPI Slave Timing CPHA =

MC9S12DT128B Device User Guide — V01.07

A.7.2 Slave Mode

Figure A-7and Figure A-8illustrate the slave mode timing. Timing values are shown in Table A-19.

SS
(INPUT)
		1
SCK
(CPOL = 0)
(INPUT)
SCK	2	4
(CPOL = 1)
(INPUT)
	7
MISO	SLAVE	MSB OUT
(OUTPUT)
	5	6

	12
4	11
9
BIT 6 . . . 1

	11	3
	12
		8
10	10
SLAVE LSB OUT

MOSI	MSB IN
(INPUT)

BIT 6 . . . 1 LSB IN

Figure A-7 SPI Slave Timing (CPHA = 0)

SS (INPUT)

SCK (CPOL = 0)

(INPUT)

SCK (CPOL = 1)

(INPUT)

MISO (OUTPUT)

7

MOSI (INPUT)

1
2
4	4
9
SLAVE	MSB OUT
5	6

MSB IN

12

11

10

BIT 6 . . . 1

BIT 6 . . . 1

3

11

12

8

SLAVE LSB OUT

LSB IN

Figure A-8 SPI Slave Timing (CPHA =1)

113

http://www.xinpian.net 提供单片机解密、IC解密、芯片解密业务 010-62245566 13810019655