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| 型号： | C164SL |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | 16-Bit Single-Chip Microcontroller |
| 中文描述： | 16位单片机 |
| 文件页数： | 10/79页 |
| 文件大小： | 1314K |
| 代理商： | C164SL |
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C164CI/SI
C164CL/SL
Data Sheet
6
V2.0, 2001-05
P4
P4.0
P4.1
P4.2
P4.3
P4.5
P4.6
17
18
19
22
23
24
IO
O
O
O
O
O
O
O
O
O
I
O
O
O
Port 4 is a 6-bit bidirectional I/O port. It is bit-wise
programmable for input or output via direction bits. For a pin
configured as input, the output driver is put into high-
impedance state. Port 4 outputs can be configured as push/
pull or open drain drivers. The input threshold of Port 4 is
selectable (TTL or special).
Port 4 can be used to output the segment address lines, the
optional chip select lines, and for serial interface lines:
1)
A16
Least Significant Segment Address Line,
CS3
Chip Select 3 Output
A17
Segment Address Line,
CS2
Chip Select 2 Output
A18
Segment Address Line,
CS1
Chip Select 1 Output
A19
Segment Address Line,
CS0
Chip Select 0 Output
A20
Segment Address Line,
CAN1_RxD CAN 1 Receive Data Input
A21
Most Significant Segment Address Line,
CAN1_TxD CAN 1 Transmit Data Output
External Memory Read Strobe. RD is activated for every
external instruction or data read access.
External Memory Write Strobe. In WR-mode this pin is
activated for every external data write access. In WRL-mode
this pin is activated for low byte data write accesses on a
16-bit bus, and for every data write access on an 8-bit bus.
See WRCFG in register SYSCON for mode selection.
Address Latch Enable Output. Can be used for latching the
address into external memory or an address latch in the
multiplexed bus modes.
RD
25
WR/
WRL
26
O
ALE
27
O
Table 2
Symbol Pin
Pin Definitions and Functions
(cont
’
d)
Input
Outp.
No.
Function
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