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Port
Description
Port G
• 5-bit I/O port
• Schmitt-
triggered input
(IRQ7, IRQ6)
Notes: 1. Modes 6 and 7 are not available in the ROMless versions.
2. After a reset in mode 6
3. After a reset in mode 4 or 5
Pins
PG4/CS0
PG3/CS1/CS7
PG2/CS2
PG1/CS3/ IRQ7/CS6
PG0/IRQ6/
ADTRG
Mode
Mode
4
5
When DDR = 0 *
2
: input port
: CS0 output
When DDR = 1 *
3
I/O port
When DDR = 1, CS167E = 1, and CSS17
= 0: Also functions as CS1 output
When DDR = 1, CS167E = 1, and CSS17
= 1: Also functions as CS7 output
I/O port
When DDR = 1 and CS25E = 1: Also
functions as CS2 output
I/O port
When DDR = 1, CS25E = 1, and CSS36 =
0: Also functions as CS3 output
When DDR = 1, CSS36 = 1, and CS167E
= 1: Also functions as CS6 output and
interrupt input pin (IRQ7)
I/O port also functioning as interrupt input
pin (IRQ6) and A/D converter input pin
(ADTRG)
Rev. 5.00, 12/03, page 219 of 1088
Mode
Mode
6 *
1
7 *
1
I/O port also
functions as
interrupt
input pins
(IRQ7, IRQ6)
and A/D
converter
input pin
(ADTRG)
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