em78p134n ELAN Microelectronics Corp, em78p134n Datasheet - Page 13

• 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)
5.1.4 R3 (Status Register)
Bit 7 (RST): Bit for reset type (read only)
Bits 6 ~ 5 (GP1 ~ 0): General purpose read/write bits.
Bit 4 (T): Time-out bit.
Bit 3 (P): Power down bit.
Bit 2 (Z): Zero flag.
Bit 1 (DC): Auxiliary carry flag
Bit 0 (C): Carry flag
5.1.5 R4 (RAM Select Register)
Bits 7 ~ 6 are general-purpose read/write bits. See the Data Memory Configuration.
Bits 5 ~ 0 are used to select registers (Address: 10~3F) in the indirect addressing
mode.
5.1.6 R5 (Unused)
5.1.7 R6 (Port 6)
Bits 7 ~ 0 (P67 ~ P60): I/O data registers, user can use the IOC6 to define each bit as
Bit 7
Bit 7
RST
P67
Bit 6
Bit 6
GP1
0: Set to 0 if the device wakes up from other reset type
1: Set to 1 if the device wakes up from sleep mode on a pin change
Set to 1 with the "SLEP" and "WDTC" command, or during power up and
reset to 0 by WDT time-out.
Set to 1 during power-on or by a "WDTC" command and reset to 0 by a
"SLEP" command.
Set to "1" if the result of an arithmetic or logic operation is zero.
P66
input/output.
Bit 5
GP0
Bit 5
P65
Bit 4 and Bit 3 (T and P) are read only.
Bit 4
Bit 4
P64
T
NOTE
Bit 3
Bit 3
P63
8-Bit Microcontroller with OTP ROM
P
Bit 2
Bit 2
P62
Z
Bit 1
Bit 1
P61
DC
EM78P134N
Bit 0
Bit 0
P60
C
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