参数资料
型号: SAB-C505CA-2R20M
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
封装: PLASTIC, MQFP-44
文件页数: 6/88页
文件大小: 1013K
代理商: SAB-C505CA-2R20M
C505/C505C/C505A/C505CA
Data Sheet
10
12.00
EA
29
I
External Access Enable
When held at high level, instructions are fetched from the
internal program memory when the PC is less than 4000H
(C505(C)(A)-2R) or 8000H (C505A-4R/C505CA-4R/C505A-
4E/C505CA-4E). When held at low level, the C505 fetches
all instructions from external program memory.
For the C505 romless versions (i.e. C505-L, C505C-L,
C505A-L and C505CA-L) this pin must be tied low.
For the ROM protection version EA pin is latched during
reset.
P0.0-P0.7
37-30
I/O
Port 0
is an 8-bit open-drain bidirectional I/O port. Port 0 pins that
have 1’s written to them float, and in that state can be used
as high-impendance inputs. Port 0 is also the multiplexed
low-order address and data bus during accesses to external
program or data memory. In this application it uses strong
internal pullup transistors when issuing 1’s.
Port 0 also outputs the code bytes during program
verification in the C505 ROM versions. External pullup
resistors are required during program verification.
VAREF
38
Reference voltage for the A/D converter.
VAGND
39
Reference ground for the A/D converter.
VSS
16
Ground (0V)
VDD
17
Power Supply (+5V)
*) I = Input
O= Output
Table 2
Pin Definitions and Functions (cont’d)
Symbol
Pin Number
I/O
*)
Function
相关PDF资料
PDF描述
SAB-C505CA-4R16M 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
SAF-C505CA-4R20M 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
SAK-C505A-4E16M 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP44
SAK-C505CA-4E20M 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PQFP44
SAK-C505-2R20M 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
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