em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 17

• Manufacturer Part Number: em78p134n
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.6) 06.02.2010
(This specification is subject to change without further notice)
Bit 5 (IDLE): Idle mode enable bit.
Bits 4 ~ 0 (Unused): Unused bits, set to 0 all the time.
5.1.15 RE (WUCR: Wake-up Control Register)
Bits 7 ~ 3 (Unused): Unused bits, set to 0 all the time.
Bit 2 (CMPWE): Comparator wake-up enable bit
Bit 1 (ICWE): Port 6 input change to wake-up status enable bit.
Bit 0 (Unused): Unused bit, set to 0 all the time.
Bit 7
fosc: stop
fs: stop
CPU: stop
0
CPU Operation Mode
Sleep Mode
external
interrupt
Bit 6
0: IDLE=”0”+SLEP instruction → sleep mode
1: IDLE=”1”+SLEP instruction → idle mode
0: Disable Comparator wake up
1: Enable Comparator wake up
When the Comparator output status change is used to enter an interrupt
vector or to wake-up the EM78P134N from sleep mode, the CMPWE bit
must be set to “Enable“.
0: Disable Port 6 input change to wake-up status
1: Enable Port 6 input change wake-up status
When the Port 6 Input Status Change is used to enter an interrupt vector
or to wake-up the EM78P134N from sleep mode, the ICWE bit must be
set to “Enable“.
0
IDLE="0"
SLEP
IDLE="0"
SLEP
external
interrupt
Bit 5
0
Figure 5-3 CPU Operation Mode
CPUS="1"
fosc: stop
fs: oscillation
CPU: using fs
fosc: oscillation
fs: oscillation
CPU: using fosc
Bit 4
0
Normal Mode
Green Mode
Bit 3
8-Bit Microcontroller with OTP ROM
0
CPUS="0"
CMPWE
IDLE="1"
SLEP
Bit 2
wake up
IDLE="1"
SLEP
ICWE
Bit 1
RESET
fosc: stop
fs: oscillation
CPU: stop
EM78P134N
Idle Mode
wake up
Bit 0
0
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