EM78P5840N/41N/42N
8-Bit Microcontrollers
7.3.5 IOC9 (Port 9 I/O Control, Port 9 Switches)
Page 0 (Port 9 I/O Control Register)
Bit 7
IOC97
R/W-1
Bit 6
IOC96
R/W-1
Bit 5
IOC95
R/W-1
Bit 4
IOC94
R/W-1
Bit 3
IOC93
R/W-1
Bit 2
IOC92
R/W-1
Bit 1
IOC91
R/W-1
Bit 0
IOC90
R/W-1
Bit 0 ~ Bit 7 (IOC90 ~ IOC97): Port 9 (0~7) I/O direction control register
"0" : Set the corresponding I/O pin as output
"1" : Set the corresponding I/O pin to high impedance
7.3.6 IOCA (Port 9 PMS Switch Control)
Page 1 (Port 9 Pin Switch Control Register)
Bit 7
Bit 6
0
Bit 5
Bit 4
Bit 3
0
Bit 2
Bit 1
AD8S
R/W-0
Bit 0
AD7S
R/W-0
-
-
-
-
-
-
-
-
R/W
R/W
Bit 0 (AD7S): Select normal I/O Port 92 pin or ADC Channel 7 input AD7 pin
"0" : P92 (I/O Port 92) pin is selected
"1" : AD7 (ADC Channel 7 input ) pin is selected
Bit 1 (AD8S) : Select normal I/O Port 93 pin or ADC Channel 8 input AD8 pin
"0" : P93 (I/O Port 93) pin is selected
"1" : AD8 (ADC Channel 8 input ) pin is selected
Bit 2 (undefined): This bit is not used
Bit 3 (undefined): This bit is not used. However, it must be cleared to “0.” Otherwise,
the MCU power consumption will increase.
Bit 4 ~ Bit 5 (undefined): These bits are not used.
Bit 6 (undefined): This bit is not used. However, this bit must be cleared to “0.”
Otherwise, the MCU power consumption will increase.
Bit 7 (undefined): This bit is not used.
7.3.7 IOCB (ADC Control)
Page 1 (ADC Control Bits)
Bit 7
Bit 6
Bit 5
Bit 4
ADCLK1 ADCLK0 ADPWR
R/W-0 R/W-0 R/W-0
Bit 3
Bit 2
Bit 1
Bit 0
IN2
IN1
IN0
0
-
ADST
R/W-0
R/W-0
R/W-0
R/W-0
Bit 0 (ADST): Start sampling at the AD converter
By setting this bit to “1”, the AD will start to sample data. This bit will
be cleared by hardware automatically after each sampling.
Product Specification (V1.0) 04.25.2006
(This specification is subject to change without further notice)
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ELAN [ ELAN MICROELECTRONICS CORP ]
