参数资料
型号: SAF-C164SL-8RM
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP80
封装: 0.65 MM PITCH, METRIC, PLASTIC, QFP-80
文件页数: 2/79页
文件大小: 1314K
代理商: SAF-C164SL-8RM
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
I
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
RD
25
O
External Memory Read Strobe. RD is activated for every
external instruction or data read access.
WR/
WRL
26
O
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.
ALE
27
O
Address Latch Enable Output. Can be used for latching the
address into external memory or an address latch in the
multiplexed bus modes.
Table 2
Pin Definitions and Functions (cont’d)
Symbol Pin
No.
Input
Outp.
Function
相关PDF资料
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