em78p862a ELAN Microelectronics Corp, em78p862a Datasheet - Page 18

• Manufacturer Part Number: em78p862a
• Description: 8-bit Risc Type Microprocessor
• Manufacturer: ELAN Microelectronics Corp

EM78862B
8-Bit RISC Type Microprocessor
12 of 35
08.02.2004 (V1.0)
Bit 3: (PAB) Pre-scaler assignment bit
Bit 4: Unused
Bit 5: (TS) TCC signal source
Bit 6: (INT): INT enable flag. This bit is read only
Bit 7: INT_EDGE
6.2.3 IOC5 (Port 5 I/O Control Register)
Bit 0:
Bit 1:
Bit 2:
Bit 3:
Bit 4 ~ 7: Port 5 I/O direction control registers
6.2.4 IOC6 (Port 6 I/O Control Register)
Bit 0:
Bit 2 ~ 7 Unused. Clear to ‘0’
IOC57
Bit 7
Bit 7
0
Refer to Section 6.2.12, IOCE (Bit 5) Register on how to switch Port 6 to normal I/O port.
0: For TCC use
1: For WDT use
0: Internal instruction cycle clock
1: 16.384KHz or RC/2 (in RC mode)
0: Interrupt masked by DISI or hardware interrupt
1: Interrupt enabled by ENI/RETI instruction
0: P7.0 (INT0) interrupt source is a rising edge signal
1: P7.0 (INT0) interrupt source is a falling edge signal
P5S is switch register for I/O port or LCD signal switching.
0: Select normal I/O port
1: Select SEG40~SEG43 output as LCD SEGMENT output
Unused.
Unused.
Unused.
0: Set the relative I/O pin as output
1: Set the relative I/O pin into high impedance
(IOC60) Port 6 I/O direction control register
0: Set the relative I/O pins as output
1: Set the relative I/O pin into high impedance
IOC56
Bit 6
Bit 6
0
CONT is a readable and writable register.
IOC55
Bit 5
Bit 5
0
IOC54
Bit 4
Bit 4
0
NOTE
NOTE
This specification is subject to change without further notice.
Bit 3
Bit 3
0
0
Bit 2
Bit 2
0
0
Bit 1
Bit 1
0
0
IOC60
Bit 0
Bit 0
P5S