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4.4 Register Description
Address
Base+0
Port A1
Base+1
Port B1
Base+2
Port C1
Base+3
Control Word
Port 1
Base+4
Interrupt
configuration
Port 1
Base+5
Interrupt
status for
Port 1 and 2
Base+8
Port A2
Base+9
Port B2
Base+A
Port C2
(10)
Base+B
Control Word
(11)
Port 2
Base+C
Interrupt
(12)
configuration
Port 2
Mode
D7
D6
RD/WR
PA1D7
PA1D6
RD/WR
PB1D7
PB1D6
RD/WR
PC1D7
PC1D6
WR
CW1D7 0
RD/WR
0
0
RD
0
0
RD/WR
PA2D7
PA2D6
RD/WR
PB2D7
PB2D6
RD/WR
PC2D7
PC2D6
WR
CW2D7 0
RD/WR
0
0
CHAPTER 4: Technical Description
D5
D4
D3
PA1D5
PA1D4
PA1D3
PB1D5
PB1D4
PB1D3
PC1D5
PC1D4 PC1D3
0
CW1D4 CW1D3
0
0
0
0
IRQST2 0
PA2D5
PA2D4
PA2D3
PB2D5
PB2D4
PB2D3
PC2D6
PC2D4 PC2D3
0
CW2D4 CW2D3
0
0
0
D2
D1
D0
PA1D2
PA1D1 PA1D0
PB1D2
PB1D1 PB1D0
PC1D2
PC1D1 PC1D0
CW1D2 CW1D1 CW1D0
IRQEN1 IRQC11 IRQC10
0
0
IRQST1
PA2D2
PA2D1 PA2D0
PB2D2
PB2D1 PB2D0
PC2D2
PC2D1 PC2D0
CW2D2 CW2D1 CW2D0
IRQEN2 IRQC21 IRQC20
11
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