943
Chapter 20
Port Functions
User’s Manual U16580EE3V1UD00
20.3.13 Port
AH
Port AH is a 6-bit I/O port that can be set to input or output mode in 1-bit units.
(1)
Functions
•
Input/output data can be specified in 1-bit units by using the port register AH (PAH).
•
Input or output mode can be set in 1-bit units by using the port mode register AH (PMAH).
•
Port mode or control mode (for alternate function) can be specified in 1-bit units by using the
port mode control register AH (PMCAH).
Table 20-16:
Alternate Function Pins and Port Types of Port AH
Note:
Alternate function not available on
μ
PD70F3447.
Caution:
On the
μ
PD70F31187, in single-chip mode 1 or in ROM-less mode, this port has exter-
nal address bus function only. Reprogramming of port AH to port mode is not possi-
ble in these modes. Reading and writing of the port register PAH and port mode
register PMAH is possible but has no effect. Reading of the port mode control regis-
ter PMCAH is possible and the result is always 3FH. Writing of the port mode control
register PMCAH is not possible.
(2)
Control registers
(a) Port register AH (PAH)
The PAH register is an 8-bit register that controls reading the pin levels and writing the output
levels of port pins PAH0 to PAH5.
This register can be read or written in 8-bit or 1-bit units.
Reset input causes an undefined register content.
Figure 20-61:
Port Register AH (PAH)
Remark:
n = 0 to 5
Port
Alternate Function
Remark
Port Type
Port AH
PAH0
to
PAH5
A16 to A21
Note
External address bus
Note
1
After reset:
Undefined
R/W
Address:
FFFFF002H
7
6
5
4
3
2
1
0
PAH
0
0
PAH5
PAH4
PAH3
PAH2
PAH1
PAH0
PAHn
Input/Output Data Control of Pin PAHn
0
Input mode: Low level is input
Output mode: Low level is output
1
Input mode: High level is input
Output mode: High level is output
Содержание MuPD70F3187
Страница 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Страница 16: ...16 User s Manual U16580EE3V1UD00 ...
Страница 28: ...28 User s Manual U16580EE3V1UD00 ...
Страница 32: ...32 User s Manual U16580EE3V1UD00 ...
Страница 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 192: ...192 Chapter 5 Memory Access Control Function μPD70F3187 only User s Manual U16580EE3V1UD00 MEMO ...
Страница 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Страница 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Страница 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Страница 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Страница 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
Страница 1052: ...1052 User s Manual U16580EE3V1UD00 ...
Страница 1053: ......