參數(shù)資料
型號(hào): XC167CS-32F
廠商: INFINEON TECHNOLOGIES AG
英文描述: 16-Bit Single-Chip Microcontroller with C166SV2 Core
中文描述: 16位單片機(jī)與C166SV2核心
文件頁數(shù): 19/90頁
文件大小: 888K
代理商: XC167CS-32F
XC167-32
Derivatives
General Device Information
Data Sheet
17
V1.0, 2005-06
P20
P20.0
P20.1
P20.2
P20.4
P20.5
P20.12
90
91
92
93
94
3
IO
O
O
I
O
I
O
Port 20 is a 6-bit bidirectional I/O port. Each pin can be
programmed for input (output driver in high-impedance
state) or output. The input threshold of Port 20 is selectable
(standard or special).
The following Port 20 pins also serve for alternate functions:
RD
External Memory Read Strobe, activated for
every external instruction or data read access.
WR/WRL
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.
READY
READY Input. When the READY function is
enabled, memory cycle time waitstates can be
forced via this pin during an external access.
ALE
Address Latch Enable Output.
Can be used for latching the address into
external memory or an address latch in the
multiplexed bus modes.
EA
External Access Enable pin.
A low-level
at this pin during and after Reset
forces the XC167 to latch the configuration from
PORT0 and pin RD, and to begin instruction
execution out of external memory.
A high-level
forces the XC167 to latch the
configuration from pins RD, ALE, and WR, and
to begin instruction execution out of the internal
program memory. “ROMless” versions must
have this pin tied to ‘0’.
RSTOUT
Internal Reset Indication Output.
Is activated
asynchronously with an external
hardware reset. It may also be activated
(selectable) synchronously with an internal
software or watchdog reset.
Is deactivated
upon the execution of the EINIT
instruction, optionally at the end of reset, or at
any time (before EINIT) via user software.
Note: Port 20 pins may input configuration values (see EA).
Table 2
Pin Definitions and Functions
(cont’d)
Sym-
bol
Pin
Num.
Input
Outp.
Function
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