HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 185

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

Port 7 has Schmitt inputs. Outputs from port 7 can drive one TTL load and a 30pF capacitive
load. They can also drive a Darlington transistor pair.
9.8.2 Port 7 Registers
Register Configuration: Table 9-12 lists the registers of port 7.
Table 9-12 Port 7 Registers
Name
Port 7 data direction register
Port 7 data register
1. Port 7 Data Direction Register (P7DDR)—H'FF8C
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.”
P7DDR can be written but not read. An attempt to read this register does not cause an error, but
all bits are read as “1,” regardless of their true values.
At a reset and in the hardware standby mode, P7DDR is initialized to H'00, setting all pins for
input. P7DDR is not initialized in the software standby mode, so if a P7DDR bit is set to “1”
when the chip enters the software standby mode, the corresponding pin continues to output the
value in the port 7 data register.
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
0
DDR P7
168
4
W
4
DDR P7
0
Read/Write
W
R/W
3
2
1
(input) /TMRI (input)
(input)
(input)
1
3
2
1
3
(output)
W
(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
DDR P7
0
Address
H'FF8C
H'FF8E
0
W
0
0
DDR