EM78156EAS EMC [ELAN Microelectronics Corp], EM78156EAS Datasheet - Page 11

• Manufacturer Part Number: EM78156EAS
• Description: 8-Bit Microcontroller with MASK ROM
• Manufacturer: EMC [ELAN Microelectronics Corp]

Product Specification (V1.3) 07.29.2004
(This specification is subject to change without further notice)
Bit 4 (T) Time-out bit.
Bit5 ~7 (GP0 ~ 2) General purpose read/write bits.
4.1.5 R4 (RAM Select Register)
Bits 0~5 are used to select registers (address: 00~06, 0F~3F) in the indirect
Bits 6~7 are not used.(read only).
4.1.6 R5 ~ R6 (Port 5 ~ Port 6)
4.1.7 RF (Interrupt Status Register)
“1” means interrupt request, and “0” means no interrupt occur.
Bit 0 (TCIF) TCC overflow interrupt flag. Set when TCC overflows, reset by software.
Bit 1 (ICIF) Port 6 input status change interrupt flag. Set when Port 6 input changes,
Bit 2 (EXIF) External interrupt flag. Set by falling edge on /INT pin, reset by software.
Bits 3 ~ 7 Not used.
4.1.8 R10 ~ R3F
All of these are 8-bit general-purpose registers.
R5 and R6 are I/O registers.
Only the lower 4 bits of R5 are available.
7
-
Set to 1 with the "SLEP" and "WDTC" commands, or during power up and
reset to 0 by WDT time-out.
addressing mode.
The Bits 6~7 set to “1” at all time.
Z flag of R3 will set to “1”, when R4 content is equal to “3F” When R4=R4+1,
R4 content will select as R0.
See the configuration of the data memory in Fig. 4.
reset by software.
RF can be cleared by instruction but cannot be set.
IOCF is the interrupt mask register.
Note that the result of reading RF is the "logic AND" of RF and IOCF.
6
-
5
-
4
-
8-Bit Microcontroller with MASK ROM
3
-
EXIF
2
ICIF
1
EM78156E
TCIF
0
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