Section 16 I/O Ports
Rev. 3.00 Sep. 27, 2007 Page 572 of 758
REJ09B0243-0300
16.4.2
Port F Data Register L (PFDRL)
The port F data register L (PFDRL) is a 16-bit read-only register that stores port F data. Bits
PF7DR to PF0DR correspond to pins PF7 to PF0 (multiplexed functions omitted here) in the
SH7125 and SH7124.
Any value written into these bits is ignored, and there is no effect on the state of the pins. When
any of the bits are read, the pin state rather than the bit value is read directly. However, when an
A/D converter analog input is being sampled, values of 1 are read. Table 16.8 summarizes port F
data register L read/write operations.
•
PFDRL (SH7125, SH7124)
Bit:
Initial value:
R/W:
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
*
*
*
*
*
*
*
*
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
0
0
0
0
0
0
0
0
-
-
-
-
-
-
-
-
PF7
DR
PF6
DR
PF5
DR
PF4
DR
PF3
DR
PF2
DR
PF1
DR
PF0
DR
Bit Bit
Name
Initial
Value
R/W Description
15 to 8
All
0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
7
PF7DR
Pin state R
See table 16.8.
6 PF6DR
Pin
state
R
5 PF5DR
Pin
state
R
4 PF4DR
Pin
state
R
3 PF3DR
Pin
state
R
2 PF2DR
Pin
state
R
1 PF1DR
Pin
state
R
0 PF0DR
Pin
state
R
Table 16.8 Port F Data Register L (PFDRL) Read/Write Operations
•
PFDRL Bits 7 to 0
Pin Function
Read
Write
General input
Pin state
Ignored (no effect on pin state)
ANn input
1
Ignored (no effect on pin state)
Summary of Contents for SH7124 R5F7124
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