HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 231

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Note:* When the IRQ2E bit in IER is set to 1 in mode 1, 2, or 3 (EXPE = 1) with the ABW bit in
8.11
Port A is an 8-bit I/O port. Port A pins also function as keyboard buffer controller I/O pins, key-
sense interrupt input pins, expansion A/D converter input pins, and address output pins. Port A pin
functions change according to the operating mode. Port A input/output operates by VccB power
independent from the Vcc power. Up to 5 V can be applied to port A pins if VccB power is 5 V.
Port A has the following registers. PADDR and PAPIN have the same address.
Operating
Mode
ABW
HI12E
FGA20E
CS2E
P90DDR
Pin Function
P90//:5/,545/$'75*/(&65
The pin function is switched as shown below according to the combination of operating mode,
the ABW bit in WSCR, the HI12E and CS2E bits in SYSCR2, the FGA20E bit in HICR, and
the P90DDR bit.
Port A data direction register (PADDR)
Port A output data register (PAODR)
Port A input data register (PAPIN)
WSCR set to 1, or in mode 2 and 3 (EXPE = 0), this pin is used as the ,545 input pin.
When TRGS1 and TRGS0 in ADCR of the A/D converter are both set to 1, this pin is used
as the $'75* input pin.
Port A
/:5 output
pin
—
0
Modes 1, 2, 3 (EXPE = 1)
input pin
P90
—
—
—
0
1
P90 output
,545 input pin, $'75* input pin*
pin
1
input pin
P90
0
Rev. 2.0, 08/02, page 191 of 788
Any one 0
Modes 2, 3 (EXPE = 0)
P90 output
pin
—
1
(&65 input
pin
—
1
1
1