HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 554
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HD64F7050
Manufacturer Part Number
HD64F7050
Description
32-Bit RISC Microcomputer SuperH RISC engine Family/
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD64F7050.pdf
(841 pages)
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Section 17 I/O Ports (I/O)
17.9.2
The port H data register (PHDR) is a 16-bit read-only register that stores port H data. Bits
PH15DR to PH0DR correspond to pins PH15/AN15 to PH0/AN0.
Writes to these bits are ignored, and do not affect the pin states. When these bits are read, the pin
state, not the register value, is returned directly. However, 1 will be returned while A/D converter
analog input is being sampled. Table 17.16 summarizes port H data register read/write operations.
PHDR is not initialized by a power-on reset, or in hardware standby mode, software standby
mode, or sleep mode. (The bits always reflect the pin states.)
Table 17.16 Port H Data Register (PHDR) Read/Write Operations
Pin Input/Output
Input
n = 0 to 15
17.10
The output port drive buffers for the address bus pins (A20 to A0) and data bus pins (D15 to D0)
can be controlled by the POD (port output disable) pin input level. However, this function is
enabled only when the address bus pins (A20 to A0) and data bus pins (D15 to D0) are designated
as general output ports.
Output buffer control by means of POD is performed asynchronously from bus cycles.
POD
POD
0
1
Rev. 5.00 Jan 06, 2006 page 534 of 818
REJ09B0273-0500
POD
POD
Initial value:
R/W:
Bit:
Port H Data Register (PHDR)
POD (Port Output Disable)
PH15
DR
15
R
0
PH14
DR
14
Address Bus Pins (A20 to A0) and Data Bus Pins (D15 to D0)
(when Designated as Output Ports)
Enabled (high-impedance)
Disabled (general output)
R
0
Pin Function
General input
ANn
PH13
DR
13
R
0
PH12
DR
12
R
0
PH11
DR
11
R
0
PH10
DR
10
Read
Pin state is read
1 is read
R
0
PH9
DR
R
9
0
PH8
DR
R
8
0
PH7
DR
R
7
0
PH6
DR
R
6
0
Ignored (does not affect pin state)
Write
Ignored (does not affect pin state)
PH5
DR
R
5
0
PH4
DR
R
4
0
PH3
DR
R
3
0
PH2
DR
R
2
0
PH1
DR
R
1
0
PH0
DR
R
0
0
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