HD6433937 Datasheet, PDF (146/521 Pages) Hitachi Semiconductor – Hardware Manual

Port Description
Pins and
Functions
Other Functions
Port 3
• 8-bit I/O port
P3₇
• MOS input pull-up option P3₆
P3₅/TXD₃₁
P3₄/RXD₃₁
P3₃/SCK₃₁
SCI31 data output (TXD₃₁),
data input (RXD₃₁), clock
input/output (SCK₃₁)
P3₂/RESO
P3₁/UD
P3₀
Reset output, timer C count-
up/down select input
Port 4 • 1-bit input internal port P4₃/IRQ₀*²
Internal IRQ interrupt 0
• 3-bit I/O port
P4₂/TXD₃₂
P4₁/RXD₃₂
P4₀/SCK₃₂
SCI32 data output (TXD₃₂),
data input (RXD₃₂), clock
input/output (SCK₃₂)
Port 5 • 8-bit I/O port
P5₇ to P5₀/
Wakeup input (WKP₇ to
• MOS input pull-up option WKP₇ to WKP₀ WKP₀)
Port 6 • 8-bit I/O port
P6₇ to P6₀
• MOS input pull-up option
Port 7 • 8-bit I/O port
P7₇ to P7₀
Port 8 • 8-bit I/O port
P8₇ to P8₀
Port 9 • 4-bit I/O port
P9₃ to P9₀
Port A • 4-bit I/O port
PA₃ to PA₀
Port B • 8-bit input port
PB₇ to PB₀/
AN₇ to AN₀
A/D converter analog input
Notes: 1. Internal I/O port for interfacing to the FLEX™ decoder.
2. Internal input port for interfacing to the FLEX™ decoder.
Function
Switching
Registers
PMR3
SCR31
SMR31
PMR3
PMR3
SCR32
SMR32
PMR5
AMR
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