HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 896
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HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417641.pdf
(1036 pages)
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Section 23 I/O Ports
23.2.2
PBDR is a 9-bit readable/writable register with seven reserved bits that stores data for pins PTB8
to PTB0. PBDR is initialized to H'0000 by a power-on reset, but it retains its previous value by a
manual reset, in standby mode, or in sleep mode.
Table 23.2 Port B Data Register (PBDR) Read/Write Operations
(n = 0 to 8)
Rev. 4.00 Sep. 14, 2005 Page 846 of 982
REJ09B0023-0400
Bit
15 to 9
7
6
5
4
3
2
1
0
PBnMD2 PBnMD1 Pin State
0
1
Port B Data Register (PBDR)
Bit Name
PB7DT
PB6DT
PB5DT
PB4DT
PB3DT
PB2DT
PB1DT
PB0DT
0
1
0
1
Input
Output
Reserved
Other functions Pin state
Initial
Value
All 0
0
0
0
0
0
0
0
0
R/W
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Read
Pin state
PBDR value
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Bits PB8DT to PB0DT correspond to pins PTB8 to
PTB0. When the pin function is general output port, the
value of the corresponding bit in PBDR is returned
directly by reading the port. When the function is
general input port, the corresponding pin level is read
by reading the port. Table 23.2 shows the function of
PBDR.
Write
Data is written to PBDR, but does not affect
pin state.
Data is written to PBDR and the value is
output from the pin.
Data is written to PBDR, but does not affect
pin state.
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