EM78862B View Datasheet(PDF) - ELAN Microelectronics
Part Name
Description
MFG CO.
'EM78862B' PDF : 40 Pages View PDF
EM78862B
8-Bit RISC Type Microprocessor
6.2.9.2 Page 1 (Counter 1 Preset Register)
Bit 7
C1D7
Bit 6
C1D6
Bit 5
C1D5
Bit 4
C1D4
Bit 3
C1D3
Bit 2
C1D2
Bit 1
C1D1
Bit 0
C1D0
Bit 0 ~ 7: (C1D0~C1D7) 8 bit up counter (COUNTER1) preset and read out register
(write = preset ). After an interruption, it will count from “0”.
6.2.10 IOCC (LCD Data, Counter 2)
6.2.10.1 Page 0 (LCD Data)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
LCDD7 LCDD6 LCDD5 LCDD4 LCDD3
Bit 0 ~ 7: (LCDD0~LCDD7) LCD RAM data register
Bit 2
LCDD2
Bit 1
LCDD1
Bit 0
LCDD0
6.2.10.2 Page 1 (Counter 2)
Bit 7
C2D7
Bit 6
C2D6
Bit 5
C2D5
Bit 4
C2D4
Bit 3
C2D3
Bit 2
C2D2
Bit 1
C2D1
Bit 0
C2D0
Bit 0 ~ 7: (C2D0~C2D7) 8 bit up-counter (COUNTER2) preset and read out register
(Write = preset). After an interruption, it will count from “00”.
6.2.11 IOCD (Pull-High Control Register, R-Option Register)
6.2.11.1 Page 0 (Pull-High Control Register)
Bit 7
PH77
Bit 6
PH76
Bit 5
PH75
Bit 4
PH74
Bit 3
PH73
Bit 2
PH72
Bit 1
PH71
Bit 0
PH70
Bit 0 ~ 7: (PH70~PH77) Control bit is used to enable the pull-high of Port 7 (#) pin.
0: Disable internal pull-high register
1: Enable internal pull-high register
6.2.11.2 Page 1 (R-Option Control Register)
Bit 7
RO7
Bit 6
RO6
Bit 5
RO5
Bit 4
RO4
Bit 3
RO3
Bit 2
RO2
Bit 1
RO1
Bit 0
RO 0
Bit 0 ~ 7: (RO0~RO7) Control bit is used to enable the R-Option of Port 9.0 ~ Port 9.7 pins.
0: Disable R-Option
1: Enable R-Option
RO is used for R-OPTION. Setting RO to ‘1’ will enable the status of R-option pin (P9.0 ~ P9.7)
to read by controller. Clearing RO will disable R-option function. If the R-option function is
used, you must connect the PORT9 pin to GND by 560K external registers. If the register is
connected/disconnected, the R9 will read as “ 0/1” when RO is set to ‘1’.
This specification is subject to change without further notice.
Mar.01.2005 (V1.1)15 of 36
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