Hitachi H8S/2670, Справочное руководство

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5.6 Port 5
5.6.1 Overview
Port 5 comprises a 4-bit I/O port (P53 to P50) and a 4-bit input-only port (P57 to P54). Port 5 pins
also function as SCI input/output pins (TxD2, RxD2, and SCK2), the A/D converter input pin
(
ADTRG
), A/D converter analog input pins (AN12 to AN15), D/A converter analog output pins
(DA2 and DA3), and interrupt input pins (
IRQ7
to
IRQ0
). Port 5 pin functions are the same in all
operating modes.
Figure 5.5 shows the port 5 pin configuration.
P57 (input) / AN15 (input) / DA3 (output) /
IRQ7
(input)
P56 (input) / AN14 (input) / DA2 (output) /
IRQ6
(input)
P55 (input) / AN13 (input) /
IRQ5
(input)
P54 (input) / AN12 (input) /
IRQ4
(input)
P53 (I/O) /
ADTRG
(input) /
IRQ3
(input)
P52 (I/O) / SCK2 (I/O) /
IRQ2
(input)
P51 (I/O) / RxD2 (input) /
IRQ1
(input)
P50 (I/O) / TxD2 (output) /
IRQ0
(input)
Port 5
Port 5 pins
Figure 5.5 Port 5 Pin Functions
5.6.2 Register Configuration
Table 5.9 shows the port 5 register configuration. Bits 7 to 4 of port 5 are input-only ports, and do
not have corresponding data direction register or data register bits.
Table 5.9 Port 5 Registers
Name Abbreviation R/W Initial Value Address
*
Port 5 data direction register P5DDR W H'0
0
H'FE24
Port 5 data register P5DR R/W H'0
0
H'FF64
Port 5 register PORT5 R Undefined H'FF54
Note: * Lower 16 bits of the address.