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參數(shù)資料
| 型號： | SAF-C505C-2RM |
| 廠商： | SIEMENS A G |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT06; No. of Contacts:5; Connector Shell Size:18; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
| 中文描述： | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44 |
| 封裝： | PLASTIC, MQFP-44 |
| 文件頁數(shù)： | 11/85頁 |
| 文件大?。?/td> | 335K |
| 代理商： | SAF-C505C-2RM |
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Semiconductor Group
11
1997-12-01
C505 / C505C
C505A / C505CA
P2.0-P2.7
18-25
I/O
Port 2
is a 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 transistors when
issuing 1s. During accesses to external data memory that
use 8-bit addresses (MOVX @Ri), port 2 issues the
contents of the P2 special function register and uses only
the internal pullup resistors.
PSEN
26
O
The
output is a control signal that enables the external program
memory to the bus during external fetch operations. It is
activated every three oscillator periods except during
external data memory accesses. Remains high during
internal program execution. This pin should not be driven
during reset operation.
Program Store
Enable
ALE
27
O
The
output is used for latching the low-byte of the address into
external memory during normal operation. It is activated
every three oscillator periods except during an external data
memory access. When instructions are executed from
internal ROM or OTP (EA=1) the ALE generation can be
disabled by bit EALE in SFR SYSCON.
ALE should not be driven during reset operation.
Address Latch Enable
*) I = Input
O= Output
Table 3
Pin Definitions and Functions
(cont’d)
Symbol
Pin Number
I/O
*)
Function
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAB-C505A-4EM | 8-Bit CMOS Microcontroller |
| SAF-C505A-4EM | 8-Bit CMOS Microcontroller |
| SAF-C505-2RM | 8-Bit CMOS Microcontroller |
| SAB-C505-2RM | 8-Bit CMOS Microcontroller |
| SAB-C513AO | 8-bit CMOS Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAF-C505CA-2RM CA | 功能描述:8位微控制器 -MCU 8-Bit Single Chip Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| SAF-C505CA-2RM CATR | 制造商:Infineon Technologies AG 功能描述: |
| SAF-C505CA-4EM | 制造商:Infineon Technologies AG 功能描述:SP000106394_8BIT OTP_TR_RO |
| SAF-C505CA-4EM CA | 功能描述:8位微控制器 -MCU 8 BIT OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT |
| SAFC505CA4EM-BB | 制造商:Infineon Technologies AG 功能描述:MCU 8-Bit C500 8051 CISC 32KB EPROM 5V 44-Pin MQFP Bulk |
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