mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 211

• Manufacturer Part Number: mc68hc908bd48
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

16.3 Features
16.4 I/O Pins
MC68HC908BD48
Freescale Semiconductor
Generic Pin Names:
Sync Processor
HSYNCO
VSYNCO
HSYNC
VSYNC
CLAMP
SOG
—
Rev. 2.1
Features of the Sync Processor include the following:
The Sync Processor uses six I/O pins, with four pins shared with
standard port I/O pins. The full name of the Sync Processor I/O pins are
listed in
follows.
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•
•
•
•
•
•
Table 16-1. Pin Name Conventions
Polarity detector
Horizontal frequency counter
Vertical frequency counter
Low vertical frequency indicator (40.7Hz)
Polarity controlled HSYNCO and VSYNCO outputs:
– From separate Hsync and Vsync
– From composite sync on HSYNC or SOG input pin
– From internal selectable free running Hsync and Vsync pulses
CLAMP pulse output to the external pre-amp chip
Internal schmitt trigger on HSYNC, VSYNC, and SOG input pins
to improve noise immunity
Table
Full MCU Pin Names:
PTE0/SOG/TCH0
PTE1/HSYNCO
PTE2/VSYNCO
PTD4/CLAMP
16-1. The generic pin name appear in the text that
HSYNC
VSYNC
Sync Processor
HSYNCOE bit in CONFIG 1 ($001D)
VSYNCOE bit in CONFIG 1 ($001D)
Sync Processor Function By:
SOGE bit in CONFIG1 ($001D)
CLAMPE bit in PDCR ($0049)
Pin Selected for
—
—
Sync Processor
Data Sheet
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