Rev. 6.00, 08/04, page 230 of 628
8.11
Port B
8.11.1
Overview
Port B is an 8-bit input-only port, configured as shown in figure 8.10.
PB
7
/AN
7
PB
6
/AN
6
PB
5
/AN
5
PB
4
/AN
4
PB
3
/AN
3
/
IRQ
1
/TMIC
PB
2
/AN
2
PB
1
/AN
1
/extU
*
PB
0
/AN
0
/extD
*
Port B
Note:
*
The extU and extD pins are implemented on the H8/38124 Group only.
Figure 8.10 Port B Pin Configuration
8.11.2
Register Configuration and Description
Table 8.29 shows the port B register configuration.
Table 8.29
Port B Register
Name
Abbr.
R/W
Initial Value
Address
Port data register B
PDRB
R
—
H'FFDE
Port mode register B
PMRB
R/W
H'F7
H'FFEE
Port Data Register B (PDRB)
Bit
Read/Write
7
PB
7
R
6
PB
6
R
5
PB
5
R
4
PB
4
R
3
PB
R
0
PB
R
2
PB
R
1
PB
R
3
2
1
0
Summary of Contents for H8/38024 Series
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