MC68HC705P9 Datasheet, PDF (118/160 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Serial Input/Output Port (SIOP)
10.2 Features
Features include:
• Master or slave operation
• Programmable MSB-first or LSB-first operation
• Interrupt-driven operation with transfer complete flag
• Data collision flag
• Master mode frequency = bus frequency ÷ 4
• Maximum slave mode frequency = bus frequency ÷ 4
• No minimum slave mode frequency
10.3 Introduction
The serial input/output port (SIOP) is a 3-wire master/slave
communication port with serial clock, data input, and data output
connections. The SIOP enables high-speed synchronous serial data
transfer between the MCU and peripheral devices. Shift registers used
with the SIOP can increase the number of parallel I/O pins controlled by
the MCU. More powerful peripherals such as analog-to-digital
converters and real-time clocks are also compatible with the SIOP.
Figure 10-1 shows the structure of the SIOP module.
Technical Data
118
Serial Input/Output Port (SIOP)
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MC68HC705P9 — Rev. 4.0
MOTOROLA