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Section 8 I/O Ports
Rev. 6.00 Sep 12, 2006 page 196 of 526
REJ09B0326-0600
8.8.2
Register Configuration and Description
Table 8.20 shows the port 8 register configuration.
Table 8.20 Port 8 Registers
Name Abbr.
R/W
Initial
Value
Address
Port data register 8
PDR8
R/W
H'00
H'FFDB
Port control register 8
PCR8
W
H'00
H'FFEB
Port Data Register 8 (PDR8)
Bit
7 6 5 4 3 2 1 0
P8
7
P8
6
P8
5
P8
4
P8
3
P8
2
P8
1
P8
0
Initial
value 0 0 0 0 0 0 0 0
Read/Write
R/W R/W R/W R/W R/W R/W R/W R/W
PDR8 is an 8-bit register that stores data for port 8 pins P8
7
to P8
0
. If port 8 is read while PCR8
bits are set to 1, the values stored in PDR8 are read, regardless of the actual pin states. If port 8 is
read while PCR8 bits are cleared to 0, the pin states are read.
Upon reset, PDR8 is initialized to H'00.
Port Control Register 8 (PCR8)
Bit
7 6 5 4 3 2 1 0
PCR8
7
PCR8
6
PCR8
5
PCR8
4
PCR8
3
PCR8
2
PCR8
1
PCR8
0
Initial
value 0 0 0 0 0 0 0 0
Read/Write W W W W W W W W
PCR8 is an 8-bit register for controlling whether each of the port 8 pins P8
7
to P8
0
functions as an
input or output pin. Setting a PCR8 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin.
Upon reset, PCR8 is initialized to H'00.
PCR8 is a write-only register, which is always read as all 1s.
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...