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: 68/162页
文件大小: 771K
代理商: SAB-C515-LM
Introduction
C515
Semiconductor Group
1-10
ALE
50
48
O
The Address Latch enable
output is used for latching the address into external
memory during normal operation. It is activated
every six oscillator periods, except during an
external data memory access.
EA
51
49
I
External Access Enable
When held high, the C515 executes instructions
from the internal ROM (C515-1R) as long as the
program counter is less than 2000H. When held low,
the C515 fetches all instructions from ext. program
memory. For the C515-L this pin must be tied low.
P0.0-P0.7
52-59
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-impedance inputs. Port 0
is also the multiplexed low-order address and data
bus during accesses to external program and data
memory. In this application it uses strong internal
pullup resistors when issuing 1's. Port 0 also outputs
the code bytes during program verification in the
C515-1R. External pullup resistors are required
during program verification.
P5.-P5.7
67-60
I/O
Port 5
is an 8-bit quasi-bidirectional I/O port with internal
pullup resistors. Port 5 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 5 pins being externally pulled low will source
current (I IL, in the DC characteristics) because of the
internal pullup resistors.
N.C.
2, 13, 14,
23, 32, 35,
46, 50, 51,
68, 70, 71
Not connected
These pins of the P-MQFP-80 package must not be
connected.
*) 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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