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參數(shù)資料
| 型號： | SAF-C502-L20N |
| 廠商： | SIEMENS A G |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8-BIT, 20 MHz, MICROCONTROLLER, PQCC44 |
| 文件頁數(shù)： | 11/46頁 |
| 文件大?。?/td> | 567K |
| 代理商： | SAF-C502-L20N |
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Semiconductor Group
10
RESET
10
9
I
RESET
A high level on this pin for two machine cycles
while the oscillator is running resets the
device. An internal diffused resistor to
V
SS
permits power-on reset using only an external
capacitor to
V
CC
.
The
Address Latch Enable
output is used for latching the low-byte of the
address into external memory during normal
operation. It is activated every six oscillator
periodes except during an external data
memory access.
ALE
33
30
O
EA
35
31
I
External Access Enable
When held at high level, instructions are
fetched from the internal ROM (SAB-C502-2R
only) when the PC is less than 4000H. When
held at low level, the SAB-C502 fetches all
instructions from external program memory.
For the SAB-C502-L this pin must be tied low.
P0.0 – P0.7
43–36
39–32
I/O
Port 0
is an 8-bit open-drain bidirectional I/O port.
Port 0 pins that have 1s 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 or data
memory. In this application it uses strong
internal pull-up resistors when issuing 1s.
Port 0 also outputs the code bytes during
program verification in the SAB-C502-2R.
External pull-up resistors are required during
program verification.
V
SS
V
CC
N.C.
22
20
–
Circuit ground potential
44
40
–
Supply terminal
for all operating modes
1, 12,
23, 34
–
–
No connection
*) I = Input
O = Output
Pin Definitions and Functions
(cont’d)
Symbol
Pin Number
I/O*)
Function
P-LCC-44
P-DIP-40
C502
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAF-C502-L20P | 8-Bit CMOS Microcontroller |
| SAF-C502-LN | 8-Bit CMOS Microcontroller |
| SAF-C502-LP | 8-Bit CMOS Microcontroller |
| SAB-C502-L20P | 8-Bit CMOS Microcontroller |
| SAB-C502-LN | 8-Bit CMOS Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAF-C502-L20P | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C502-LN | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C502-LP | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAFC503 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C503 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
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