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MC68F375
SINGLE-CHIP INTEGRATION MODULE 2 (SCIM2E)
MOTOROLA
REFERENCE MANUAL
Rev. 25 June 03
4-94
The SCIM2E will respond to port G data register (PORTG) accesses at any time the
MCU is not in emulation mode. Reset has no effect on this register.
4.10.5.1 Port G and H Data Registers
Port G is available in single-chip mode only. These pins are always configured for use
as general-purpose I/O in single-chip mode.
Port H is available in single-chip and 8-bit expanded modes only. The function of these
pins is determined by the operating mode. There is no pin assignment register asso-
ciated with this port.
These port data registers can be read or written any time the MCU is not in emulation
mode. Reset has no effect.
4.10.5.2 Port G and H Data Direction Registers
The bits in this register control the direction of the port pin drivers when pins are con-
figured as I/O. Setting a bit configures the corresponding pin as an output. Clearing a
bit configures the corresponding pin as an input.
4.10.6 Port H
Port H is available in single-chip and 8-bit expanded modes only. The function of these
pins is determined by the operating mode. There is no pin assignment register asso-
ciated with this port.
The SCIM2E will respond to port H data register (PORTH) accesses at any time the
MCU is not in emulation mode. Reset has no effect on this register.
The port H data direction register (DDRH) controls the direction of the pin drivers when
port H pins are configured for I/O. Setting a bit configures the corresponding pin as an
output. Clearing a bit configures the corresponding pin as an input.
PORTG — Port G Data Register
0xYF FA0C
PORTH — Port H Data Register
0xYF FA0D
MSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LSB
0
PG7
PG6
PG5
PG4
PG3
PG2
PG1
PG0
PH7
PH6
PH5
PH4
PH3
PH2
PH1
PH0
RESET:
U
DDRG — Port G Data Direction Register
0xYF FA0E
DDRH— Port H Data Direction Register
0xYF FA0F
MSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
LSB
0
DDG7 DDG6 DDG5 DDG4 DDG3 DDG2 DDG1 DDG0 DDH7
DDH6
DDH5
DDH4
DDH3
DDH2
DDH1
DDH0
RESET:
0
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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