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EM78P312N
8-Bit Microcontroller
48 •
Product Specification (V1.0) 10.03.2006
(This specification is subject to change without further notice)
General Purpose Registers
Address Name Reset Type Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit Name - - - - - - - -
Power-on U U U U U U U U
/RESET and WDT time out P P P P P P P P
0x10
~
0x3F
R10
~
R3F
Wake-up from Sleep, Idle mode P P P P P P P P
Legend: “×” = not used “P” = previous value before reset
“u” = unknown or don’t care “t” = check Table 7
5.14.4 The Status of RST, T, and P of the Status Register
The values of T and P are used to verify the event that triggered the processor to wake
up. Table 7 shows the events that may affect the status of T and P.
Table 7. The Values of RST, T and P after a reset
Reset Type T P
Power on 1 1
/RESET during Operation mode *P *P
/RESET wake-up during Sleep mode *P *P
/RESET wake-up during Idle mode *P *P
WDT during Operation mode 0 *P
WDT wake-up during Sleep mode 0 *P
WDT wake-up during Idle mode 0 *P
*P: Previous status before reset
Table 8 The Events that may affect the T and P Status
Event T P
Power on 1 1
WDTC instruction 1 1
WDT time-out 0 *P
SLEP instruction 1 0
Wake-Up during Sleep mode *P *P
*P: Previous value before reset