mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 403

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

At reset, all bits in the RGPIO_DIR are cleared.
17.3.2
The RGPIO_DATA register specifies the write data for a properly-enabled RGPIO output pin or the
sampled read data value for a properly-enabled input pin. An attempted read of the RGPIO_DATA register
returns undefined data for disabled pins, since the data value is dependent on the device-level pin muxing
and pad implementation. The RGPIO_DATA register is read/write. At reset, all bits in the RGPIO_DATA
registers are cleared.
To set bits in a RGPIO_DATA register, directly set the RGPIO_DATA bits or set the corresponding bits in
the RGPIO_SET register. To clear bits in the RGPIO_DATA register, directly clear the RGPIO_DATA
bits, or clear the corresponding bits in the RGPIO_CLR register. Setting a bit in the RGPIO_TOG register
inverts (toggles) the state of the corresponding bit in the RGPIO_DATA register.
Freescale Semiconductor
Offset: RGPIO_Base + 0x0 (RGPIO_DIR)
Field
Offset: RGPIO_Base + 0x2 (RGPIO_DATA)
15–0
Reset
DIR
Reset
W
W
R
R
RGPIO_Base + 0x8
RGPIO_Base + 0xC
RGPIO_Base + 0x6
RGPIO_Base + 0xA
RGPIO_Base + 0xE
RGPIO data direction.
0 A properly-enabled RGPIO pin is configured as an input
1 A properly-enabled RGPIO pin is configured as an output
15
15
0
0
RGPIO Data (RGPIO_DATA)
14
14
0
0
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
13
13
0
0
Figure 17-2. RGPIO Data Direction Register (RGPIO_DIR)
Figure 17-3. RGPIO Data Register (RGPIO_DATA)
12
12
0
0
Table 17-5. RGPIO_DIR Field Descriptions
11
11
0
0
10
10
0
0
0
0
9
9
Description
8
0
8
0
DATA
DIR
0
0
7
7
0
0
6
6
0
0
5
5
0
0
4
4
3
0
3
0
Rapid GPIO (RGPIO)
Access: Read/write
Access: Read/write
Read/Indirect Write
Read/Indirect Write
Read/Indirect Write
0
0
2
2
0
0
1
1
Read-only
Read-only
17-5
0
0
0
0