em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 66

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

EM78F648/644/642/641/548/544/542/541N
8-Bit Microcontroller
56 •
Bit 4 (TC2SS): TC2 clock source select bit
Bit 3 (TC3SS): TC3 clock source select bit
Bit 2 (TASS):
Bit 1 (TBSS):
Bit 0:
6.3.9 Bank0 RC: ISR1 (Interrupt Status Register 1)
NOTE: Set to “1” to enable Interrupt Request, “0” to disable interrupt execution.
Bit 7(LVDIF): Low voltage detector interrupt flag
Bit 6:
Bit 5 (SPIF):
Bit 4 (PWMBIF): PWMB (Pulse Width Modulation) interrupt flag.
Bit 3 (PWMAIF): PWMA (Pulse Width Modulation) interrupt flag.
Bit 2 (EXIF):
LVDIF
Bit 7
Bit 6
Not used, fixed 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.
When LVD1, LVD0 = “0,0”, Vdd > 2.3V, LVDIF is “0”,
When LVD1, LVD0 = “0,1”, Vdd > 3.3V, LVDIF is “0”,
When LVD1, LVD0 = “1,0”, Vdd > 4.0V, LVDIF is “0”,
When LVD1, LVD0 = “1,1”, Vdd > 4.5V, LVDIF is “0”,
0
0: Fs is used as Fc
1: Fm is used as Fc
0: Fs is used as Fc
1: Fm is used as Fc
Timer A clock source select bit
0: Fs is used as Fc
1: Fm is used as Fc
Timer B clock source select bit
0: Fs is used as Fc
1: Fm is used as Fc
Not used, fixed to “0” all the time.
Vdd<= 2.3V, set LVDIF to “1”. LVDIF reset to “0” by software.
Vdd<= 3.3V, set LVDIF to “1”. LVDIF reset to “0” by software.
Vdd<= 4.0V, set LVDIF to “1”. LVDIF reset to “0” by software.
Vdd<= 4.5V, set LVDIF to “1”. LVDIF reset to “0” by software.
SPIF
Bit 5
PWMBIF
Bit 4
(This specification is subject to change without further notice)
PWMAIF
Bit 3
Product Specification (V1.0) 05.05.2010
Bit 2
EXIF
Bit 1
ICIF
Bit 0
TCIF