HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 190

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

9.8 Port 7
9.8.1 Overview
Port 7 is an 8-bit input/output port with the pin configuration shown in figure 9-19. Its pins also
carry input and output signals for the on-chip free-running timers (FRT1, FRT2, and FRT3), and
two input signals for the on-chip 8-bit timer.
Port 7 has Schmitt inputs. Outputs from port 7 can drive one TTL load and a 30 pF capacitive
load. They can also drive a Darlington transistor pair.
9.8.2 Port 7 Registers
Register Configuration: Table 9-13 lists the registers of port 7.
Table 9-13 Port 7 Registers
Name
Port 7 data direction register
Port 7 data register
1. Port 7 Data Direction Register (P7DDR)—H'FE8C
Bit
Initial value
Read/Write
P7DDR is an 8-bit register that selects the direction of each pin in port 7. A pin functions as an
output pin if the corresponding bit in P7DDR is set to 1, and as an input pin if the bit is cleared to 0.
Port
7
P7
7
W
7
DDR P7
0
6
W
6
0
DDR P7
Figure 9-19 Pin Functions of Port 7
P7
P7
P7
P7
P7
P7
P7
P7
Abbreviation
P7DDR
P7DR
7
6
5
4
3
2
1
0
(input/output) / FTOA
(input/output) / FTOB
(input/output) / FTOB
(input/output) / FTOB
(input/output) / FTI
(input/output) / FTI
(input/output) / FTI
(input/output) / TMCI (input)
5
W
5
DDR P7
0
173
4
W
4
DDR P7
0
Read/Write
W
R/W
3
2
1
(input) /TMRI (input)
(input)
(input)
1
3
2
1
3
W
(output)
(output) / FTCI
(output) / FTCI
(output) / FTCI
3
0
DDR P7
Initial Value
H'00
H'00
2
W
2
DDR P7
0
3
2
1
(input)
(input)
(input)
1
W
1
0
DDR P7
Address
H'FE8C
H'FE8E
0
W
0
DDR
0