em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 31

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
1
2
Bits 3 ~ 0: Not used, set to “0” all the time.
6.1.16 Bank 0 RF (Interrupt Status Register 1)
NOTE: Set to “1” to enable Interrupt Request, “0” to disable interrupt execution.
Bits 7 ~ 6:
Bit 5 (SPIIF):
Bit 4 (PWMBIF): PWMB (Pulse Width Modulation) Interrupt flag
Bit 3 (PWMAIF): PWMA (Pulse Width Modulation) interrupt flag.
Bit 2 (EXIF):
Bit 1 (ICIF):
(Normal Mode Source)
455K, 4M, 8M, 16 MHz
continue to work in Normal/Green mode.
The oscillator stable time depends on the oscillator characteristics
After the oscillator has stabilized, the CPU will count 254/32 CLK in Normal/Green mode and
Ex 1: The 4 MHz IRC Wakes-up from Sleep mode to Normal mode. The total Wake-up time
Ex 2: The 4 MHz IRC Wakes-up from Sleep mode to Green mode. The total wake-up time is
Bit 7
1M ~ 16 MHz
-
For F642/542N, Bit 5 ~ Bit 3 are unused. Set to “0” all the time.
For F641/541N, Bit 5 ~ Bit 3 are unused. Set to “0” all the time
Oscillator
is 2 µs + 32 CLK @ 4 MHz
100 µs + 32 CLK @ 16kHz
Crystal ;
3.5 MHz
ERC ;
IRC ;
Bit 6
-
Not used, set to “0” all the time.
SPI mode Interrupt flag. Flag is cleared by software.
Set when a selected period is reached. Reset by software.
Set when a selected period is reached. Reset by software.
External interrupt flag. Set by a falling edge on /INT pin, reset by
software.
Port 6 input status change interrupt flag. Set when Port 6 input
changes, reset by software.
Sleep/Idle → Normal
Green → Normal
Sleep/Idle → Green
Sleep/Idle → Normal
Green → Normal
Sleep/Idle → Green
Sleep/Idle → Normal
Green → Normal
Sleep/Idle → Green
CPU Mode Status
SPIIF
Bit 5
PWMBIF
EM78F648/644/642/641/548/544/542/541N
Bit 4
NOTE
Oscillator Stable Time
PWMAIF
Bit 3
0.5 ms ~ 2 ms
< 100 µs
< 100 µs
< 100 µs
< 5 µs
< 2 µs
(S)
1
EXIF
Bit 2
8-Bit Microcontroller
Bit 1
ICIF
Normal/Green
Count from
254 CLK
254 CLK
(CLK)
32 CLK
32 CLK
32 CLK
2
Bit 0
TCIF
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