A.7 SPI
This section provides electrical parametrics and ratings for the SPI.
In Table A-18 the measurement conditions are listed.
Description
Drive mode
Load capacitance C
LOAD,
on all outputs
Thresholds for delay
measurement points
A.7.1 Master Mode
In Figure A-6 the timing diagram for master mode with transmission format CPHA=0 is depicted.
1
SS
(OUTPUT)
SCK
(CPOL = 0)
(OUTPUT)
SCK
(CPOL = 1)
(OUTPUT)
MISO
(INPUT)
MOSI
(OUTPUT)
1.if configured as an output.
2. LSBF = 0. For LSBF = 1, bit order is LSB, bit 1, ..., bit 6, MSB.
In Figure A-7 the timing diagram for master mode with transmission format CPHA=1 is depicted.
Table A-18 Measurement Conditions
2
1
4
4
5
6
2
BIT 6 . . . 1
MSB IN
10
2
BIT 6 . . . 1
MSB OUT
Figure A-6 SPI Master Timing (CPHA=0)
MC9S12DT256 Device User Guide — V03.07
Value
full drive mode
50
(20% / 80%) VDDX
12
12
LSB IN
9
Unit
—
pF
V
13
3
13
11
LSB OUT
119