em78p131a ELAN Microelectronics Corp, em78p131a Datasheet - Page 11

• Manufacturer Part Number: em78p131a
• Description: 8-bit Microcontroller With Otp Rom
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.2) 09.16.2009
(This specification is subject to change without further notice)
5.1.4 R3 (Status Register)
Bit 0 (C):
Bit 1 (DC): Auxiliary carry flag
Bit 2 (Z):
Bit 3 (P):
Bit 4 (T):
Bits 5 ~6 (GP0 ~ GP1): General-purpose read/write bits
Bit 7 (RST): Bit for reset type
5.1.5 R4 (RAM Select Register)
Bits 0 ~ 5 are used to select registers (Address: 00~06, 0F~2F) in indirect addressing
Bits 6 ~ 7 are general-purpose read bits.
See the Data Memory Configuration in Fig. 5-3.
5.1.6 R6 (Port 6)
R6 are I/O registers.
R5 are reserved.
P63 is input only.
Bit 7
RST
mode.
Carry flag
Zero flag
Set to "1" if the result of an arithmetic or logic operation is zero.
Power down bit
Set to “1” during power on or by a "WDTC" command; and reset to “0” by a
"SLEP" command.
Time-out bit
Set to “1” with the "SLEP" and "WDTC" commands, or during power up;
and reset to “0” by WDT time-out.
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
Bit 6
GP1
Bit 5
GP0
Bit 4
T
Bit 3
8-Bit Microcontroller with OTP ROM
P
Bit 2
Z
Bit 1
DC
EM78P131A
Bit 0
C
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