MC9S12T64 Datasheet, PDF (459/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Serial Peripheral Interface (SPI)
Block Diagram
This is a high level description only, detailed descriptions of operating
modes are contained in section Low Power Mode Options.
Block Diagram
Figure 91 is a block diagram of the Serial Peripheral Interface.
BUS CLOCK
BAUD RATE GENERATOR
DIVIDER
2 4 8 16 32 64 128 256
SELECT
SPI BAUD RATE REGISTER
SPI CONTROL
8-BIT SHIFT REGISTER
SPI DATA REGISTER
BAUD CLOCK
MUXED CLOCK
CLOCK
LOGIC
S
M
M
S
PIN
CONTROL
LOGIC
S
M
MISO
MOSI
SS
SCK
SPI STATUS REGISTER
SPI CONTROL REGISTER 1
SPC0
BIDIROE
SPI CONTROL REGISTER 2
IPBUS
Figure 91 SPI Block Diagram
Serial Peripheral Interface (SPI)
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MC9S12T64Revision 1.1.1