HD6432621 Hitachi, HD6432621 Datasheet - Page 321

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Pin
PF3/LWR/
ADTRG/IRQ3
PF2/WAIT/
BREQO
PF1/BACK/
BUZZ *
Selection Method and Pin Functions
The pin function is switched as shown below according to the operating mode,
the bus mode, A/D converter bits TRGS1 and TRGS0, and bit PF3DDR.
Notes: *1 ADTRG input when TRGS0 = TRGS1 = 1.
The pin function is switched as shown below according to the combination of
the operating mode, and bits BREQOE, WAITE, ABW5 to ABW2, and
PF2DDR.
The pin function is switched as shown below according to the combination of
the operating mode, and bits BRLE, BUZZE, and PF1DDR.
Note: * BUZZ output pin in the H8S/2626 Series only.
Operating
Mode
Bus mode
PF3DDR
Pin function
Operating
Mode
BREQOE
WAITE
PF2DDR
Pin function
Operating
Mode
BRLE
BUZZE
PF1DDR
Pin function
*2 When used as an external interrupt input pin, do not use as an I/O
pin for another function.
16-bit bus
input
PF1
input
output
PF2
mode
LWR
0
0
—
0
0
output
Modes 4 to 6
PF1
Modes 4 to 6
output
0
1
PF2
PF3 input
Modes 4 to 6
0
1
8-bit bus mode
0
BUZZ *
output
—
1
WAIT
input
—
1
PF3 output PF3 input
BACK
output
ADTRG input
—
—
1
1
IRQ3 input
BREQO
output
—
—
1
input
PF1
0
0
2
0
1
input
PF2
Mode 7
output
Mode 7
0
PF1
—
Mode 7
1
—
PF3 output
—
—
output
BUZZ *
output
PF2
1
1
—
1
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