参数资料
型号: SAB-C515-LM
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 16 MHz, MICROCONTROLLER, PQFP80
封装: PLASTIC, MQFP-80
文件页数: 57/162页
文件大小: 771K
代理商: SAB-C515-LM
Semiconductor Group
1-9
Introduction
C515
XTAL2
39
36
XTAL2
Input to the inverting oscillator amplifier and input to
the internal clock generator circuits.
To drive the device from an external clock source,
XTAL2 should be driven, while XTAL1 is left
unconnected. Minimum and maximum high and low
times as well as rise/fall times specified in the AC
characteristics must be observed.
XTAL1
40
37
XTAL1
Output of the inverting oscillator amplifier.
P2.0-P2.7
41-48
38-45
I/O
Port 2
is an 8-bit quasi-bidirectional I/O port with internal
pullup resistors. Port 2 pins that have 1's written to
them are pulled high by the internal pullup resistors,
and in that state can be used as inputs. As inputs,
port 2 pins being externally pulled low will source
current (I IL, in the DC characteristics) because of the
internal pullup resistors.
Port 2 emits the high-order address byte during
fetches from external program memory and during
accesses to external data memory that use 16-bit
addresses (MOVX @DPTR). In this application it
uses strong internal pullup resistors when issuing
1's. During accesses to external data memory that
use 8-bit addresses (MOVX @Ri), port 2 issues the
contents of the P2 special function register.
PSEN
49
47
O
The Program Store Enable
output is a control signal that enables the external
program memory to the bus during external fetch
operations. It is activated every six oscillator periods,
except during external data memory accesses. The
signal remains high during internal program
execution.
*) I = Input
O = Output
Table 1-1
Pin Denitions and Functions (cont’d)
Symbol
Pin
Number
P-LCC-
68
Pin
Number
P-MQFP-
80
I/O*) Function
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