atam894 ATMEL Corporation, atam894 Datasheet - Page 29
atam894
Manufacturer Part Number
atam894
Description
Atam894 8k-flash Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.ATAM894.pdf
(97 pages)
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6.2.4.1
6.2.4.2
4679D–4BMCU–05/05
Port 4 Data Register (P4DAT)
Port 4 Control Register (P4CR) Byte Write
Figure 6-6.
P4xM2, P4xM1
P4DAT
P4CR
Master reset
PIn
PDir
Intx
I/O Bus
POut
I/O Bus
I/O Bus
First write
cycle
Second write
cycle
Bit 3
P4DAT3
Bi-directional Port 4 and Port 6
–
PxDATy
PxCRy
D
D
Port 4x Interrupt Mode/Direction Code
S
S
Q
Q
(Direction)
Bit 2
P4DAT2
PxMRy
Bit 3
P41M2
Bit 7
P43M2
Bit 1
P4DAT1
Bit 2
P41M1
Bit 6
P43M1
(1)
Flash options
Bit 0
P4DAT0
Bit 1
P40M2
Bit 5
P42M2
V
DD
(1)
(1)
pull-down
Switched
Auxiliary register address: '4'hex
Bit 0
P40M1
Bit 4
P42M1
Switched
Primary register address: '4'hex
Reset value: 1111b
pull-up
(1)
(1)
Reset value: 1111b
Reset value: 1111b
V
DD
V
ATAM894
DD
(1)
(1)
Static
pull-up
Static
pull-down
BPxy
29
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