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PDF EM78156N Data sheet ( Hoja de datos )
| Número de pieza | EM78156N | |
| Descripción | 8-BIT MICRO-CONTROLLER | |
| Fabricantes | ELAN Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de EM78156N (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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EM78P156N
OTP ROM
EM78P156N
8-BIT MICRO-CONTROLLER
Version 1.2
1 page  
EM78P156N
OTP ROM
* 20 pin SSOP 209mil : EM78P156NKM
• 99.9% single instruction cycle commands
• The transient point of system frequency between HXT and LXT is around 400KHz
This specification is subject to change without prior notice. 5
07.29.2004 (V1.2)
5 Page 
EM78P156N
OTP ROM
4. R3 (Status Register)
76543210
GP2
GP1
GP0
T
P
Z DC C
• Bit 0 (C) Carry flag
• Bit 1 (DC) Auxiliary carry flag
• Bit 2 (Z) Zero flag.
Set to "1" if the result of an arithmetic or logic operation is zero.
• Bit 3 (P) Power down bit.
Set to 1 during power on or by a "WDTC" command and reset to 0 by a "SLEP" command.
• Bit 4 (T) Time-out bit.
Set to 1 with the "SLEP" and "WDTC" commands, or during power up and reset to 0 by WDT
time-out.
• Bit5 ~7 (GP0 ~ 2) General-purpose read/write bits.
5. R4 (RAM Select Register)
• Bits 0~5 are used to select registers (address: 00~06, 0F~3F) in the indirect addressing mode.
• Bits 6~7 are not used (read only).
• 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.
6. R5 ~ R6 (Port 5 ~ Port 6)
• R5 and R6 are I/O registers.
• Only the lower 4 bits of R5 are available.
7. RF (Interrupt Status Register)
76543210
- - - - - EXIF ICIF TCIF
“1” means interrupt request, and “0” means no interrupt occurs.
• 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, reset by
software.
• Bit 2 (EXIF) External interrupt flag. Set by falling edge on /INT pin, reset by software.
• Bits 3 ~ 7 Not used.
This specification is subject to change without prior notice. 11
07.29.2004 (V1.2)
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet EM78156N.PDF ] | |
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