sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 71

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

1
2.3.3
Freescale Semiconductor
Function
Address 0x0000 (PRR)
Read: Anytime. The data source is depending on the data direction value.
Write: Anytime
Altern.
Field
7-4,2
Reset
PA
PA
PA
PA
3
1
0
W
R
Port A general purpose input/output data—Data Register, LCD segment driver output
The associated pin can be used as general purpose I/O when not used as alternative function is not enabled. In
general purpose output mode the register bit value is driven to the pin. If the associated data direction bit is set to 1,
a read returns the value of the port register bit, otherwise the buffered pin input state is read.
Port A general purpose input/output data—Data Register, LCD segment driver output, API_EXTCLK
The associated pin can be used as general purpose I/O when not used as alternative function. In general purpose
output mode the register bit value is driven to the pin. If the associated data direction bit is set to 1, a read returns
the value of the port register bit, otherwise the buffered pin input state is read.
Port A general purpose input/output data—Data Register, LCD segment driver output, XIRQ
The associated pin can be used as general purpose I/O when not used as alternative function. In general purpose
output mode the register bit value is driven to the pin. If the associated data direction bit is set to 1, a read returns
the value of the port register bit, otherwise the buffered pin input state is read.
Port A general purpose input/output data—Data Register, LCD segment driver output, IRQ
The associated pin can be used as general purpose I/O when not used as alternative function. In general purpose
output mode the register bit value is driven to the pin. If the associated data direction bit is set to 1, a read returns
the value of the port register bit, otherwise the buffered pin input state is read.
• The LCD segment driver output takes precedence over the general purpose I/O function if the related LCD
• The LCD segment driver output takes precedence over the API_EXTCLK and general purpose I/O function if the
• The API_EXTCLK takes precedence over the general purpose I/O function if the API_EXTCLK function is enabled
• The LCD segment driver output takes precedence over the XIRQ and general purpose I/O function if the related
• The XIRQ takes precedence over the general purpose I/O function if the XIRQ function is enabled
• The LCD segment driver output takes precedence over the IRQ and general purpose I/O function if the related
• The IRQ takes precedence over the general purpose I/O function if the IRQ function is enabled
FP36
Port A Data Register (PORTA)
PA7
segment is enabled.
related LCD segment is enabled.
LCD segment is enabled.
LCD segment is enabled.
—
0
7
FP35
PA6
—
0
6
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
Table 2-4. PORTA Register Field Descriptions
Figure 2-1. Port A Data Register (PORTA)
FP34
PA5
—
5
0
FP33
PA4
—
0
4
Description
API_EXTCLK
FP32
PA3
0
3
FP31
PA2
—
Port Integration Module (S12HYPIMV1)
0
2
Access: User read/write
XIRQ
FP30
PA1
0
1
FP29
IRQ
PA7
0
0
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