em78p468n ELAN Microelectronics Corp, em78p468n Datasheet - Page 24

• Manufacturer Part Number: em78p468n
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78P468N/L
8-Bit Microcontroller
18 •
6.2.11 IOCE0/LPWTPR (Low-Pulse Width Timer Preset Register)
(Address: 0Eh, Bit 0 of R5 = “0”)
Bit 7 ~ Bit 0: All are low-pulse width timer buffer that user can read and write.
Low-pulse width timer preset is an eight-bit down-counter with 8-bit prescaler that is
used as IOCE0 to preset the counter and read preset value. The prescaler is set by
IOCA1 register. After an interrupt, it will reload the preset value.
For PWM or IR application, this control register is set as low pulse width.
If the low-pulse width timer clock source is F
6.2.12 IOCF0/IMR (Interrupt Mask Register)
(Address: 0Fh, Bit 0 of R5 = “0”)
Bit 7 ~ Bit 0: interrupt enable bit. Enable the respective interrupt source.
IOCF0 register is readable and writable.
6.2.13 IOC61/WUCR (Wake-up and Sink Current of P5.7/IROUT
(Address: 06h, Bit 0 of R5 = “1”)
Bit 7: IROCS: IROUT/Port 5.7 output sink current set
Bits 6, 5, 4: Not used
Bit 3 (/WUE8H): 0/1→ enable/disable P8.4~P8.7 pin change wake-up function
IROCS
Bit 7
Bit 7
Bit 7
Bit 7
ICIE
Registers of IOC Page 1 (IOC61 ~ IOCE1, Bit 0 of R5 = “1”)
1: enable interrupt
0: disable interrupt
Control Register)
IROCS
LPWTE
0
1
Bit 6
Bit 6
Bit 6
Bit 6
--
Low pulse time =
HPWTE
Bit 5
Bit 5
Bit 5
Bit 5
--
prescaler
CNT2E
VDD=5V
Bit 4
Bit 4
Bit 4
Bit 4
10 mA
20 mA
(This specification is subject to change without further notice)
--
P5.7/IROUT Sink Current
( *
/WUE8H
T
CNT1E
Bit 3
Bit 3
Bit 3
Bit 3
preset
, then
F
Product Specification (V1.6) 12.31.2007
T
_
value
/WUE8L
INT1E
Bit 2
Bit 2
Bit 2
Bit 2
VDD=3V
12 mA
+
6 mA
) 1
/WUE6H
INT0E
Bit 1
Bit 1
Bit 1
Bit 1
/WUE6L
TCIE
Bit 0
Bit 0
Bit 0
Bit 0