EM78P5840N/41N/42N
8-Bit Microcontrollers
7.2.4 R3 (Status, Page Selection)
(Status Flag, Page Selection Bits)
Bit 7
RPAGE1 RPAGE0 IOCPAGE
R/W-0 R/W-0 R/W-0
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
T
P
R
Z
DC
C
R
R/W
R/W
R/W
Bit 0 (C): Carry flag
Bit 1(DC): Auxiliary carry flag
Bit 2 (Z): Zero flag
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 by the "SLEP" and "WDTC" command, or during power up and
reset to 0 by WDT timeout.
Event
T
0
0
1
1
x
P
0
1
0
1
x
Remarks
WDT wakes up from sleep mode
WDT times out (not in sleep mode)
/RESET wakes up from sleep
Power up
Low pulse on /RESET
x=don'tcare
Bit 5 (IOCPAGE): Change IOC pages between Page 0 and Page 1
"0" : IOC Page 0
"1" : IOC Page 1
See Section 7.1.2 “IOC Page Register Configuration” for further details.
Bits 6~7 (RPAGE0 ~ RPAGE1): Change R pages between Page 0 ~ Page 3
(RPAGE1, RPAGE0)
R Page # Selected
R Page 0
(0, 0)
(0, 1)
(1, 0)
(1, 1)
R Page 1
R Page 2
R Page 3
Refer to Section 7.1.1 “R Page Register Configuration” for further details.
Product Specification (V1.0) 04.25.2006
(This specification is subject to change without further notice)
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ELAN [ ELAN MICROELECTRONICS CORP ]
