mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 395

• Manufacturer Part Number: mc68hc916y3
• Description: Mc68hc16y3 16 Bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

D.2.20 Port F Edge-Detect Interrupt Vector
PFIVR — Port F Edge-Detect Interrupt Vector Register
D.2.21 Port F Edge-Detect Interrupt Level
PFLVR — Port F Edge-Detect Interrupt Level Register
D.2.22 Port C Data Register
PORTC — Port C Data Register
MC68HC16Y3/916Y3
USER’S MANUAL
15
15
15
RESET:
RESET:
RESET:
When the corresponding pin is configured for edge detection, a PORTFE bit is set if
an edge is detected. PORTFE bits remain set, regardless of the subsequent state of
the corresponding pin, until cleared. To clear a bit, first read PORTFE, then write the
bit to zero. When a pin is configured for general-purpose I/O or for use as an interrupt
request input, PORTFE bits do not change state. Bits [15:8] are unimplemented and
will always read zero.
This register determines which vector in the exception vector table is used for inter-
rupts generated by the port F edge-detect logic. Program PFIVR[7:0] to the value
pointing to the appropriate interrupt vector. Bits [15:8] are unimplemented and will al-
ways read zero.
This register determines the priority level of the port F edge-detect interrupt. The reset
value is $00, indicating that the interrupt is disabled. When several sources of inter-
rupts from the SCIM are arbitrating for the same level, the port F edge-detect interrupt
has the lowest arbitration priority. Bits [15:8] are unimplemented and will always read
zero.
PORTC latches data for chip-select pins configured as discrete outputs.
14
14
13
13
12
12
NOT USED
NOT USED
NOT USED
Freescale Semiconductor, Inc.
11
11
For More Information On This Product,
10
10
Go to: www.freescale.com
REGISTER SUMMARY
9
9
8
8
8
7
0
7
0
0
7
0
0
PC6
6
0
6
0
0
6
1
PC5
5
0
5
0
0
5
1
PC4
4
0
4
0
0
4
1
PFIVR[7:0]
PC3
3
0
3
0
0
3
1
PC2
2
0
2
0
2
1
$YFFA2A
$YFFA2C
PFLV[2:0]
$YFFA41
MOTOROLA
PC1
1
0
1
0
1
1
D-17
PC0
0
0
0
0
0
1