mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 549

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Appendix K
SPI Electrical Specifications
This section provides electrical parametrics and ratings for the SPI.
In Table K-1. the measurement conditions are listed.
K.1
K.1.1
In Figure K-1. the timing diagram for master mode with transmission format CPHA=0 is depicted.
In Figure K-2. the timing diagram for master mode with transmission format CPHA=1 is depicted.
Freescale Semiconductor
Drive mode
Load capacitance C
on all outputs
Thresholds for delay
measurement points
1
Timing specified for equal load on all SPI output pins. Avoid asymmetric load.
(CPOL = 1)
(CPOL = 0)
(OUTPUT)
(OUTPUT)
(OUTPUT)
(OUTPUT)
1. If enabled.
2. LSBFE = 0. For LSBFE = 1, bit order is LSB, bit 1, ..., bit 6, MSB.
(INPUT)
Timing
MISO
MOSI
Master Mode
SCK
SCK
SS
Description
1
LOAD
1
2
,
5
10
MSB IN
MSB OUT
MC9S12VR Family Reference Manual, Rev. 2.2
Figure K-1. SPI Master Timing (CPHA=0)
Preliminary - Subject to Change Without Notice
2
6
Table K-1. Measurement Conditions
4
2
1
(35% / 65%) VDDX
4
BIT 6 . . . 1
full drive mode
BIT 6 . . . 1
9
Value
50
12
12
LSB IN
LSB OUT
13
13
SPI Electrical Specifications
Unit
pF
—
11
V
3
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