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| 型号： | SST89E54RC-40-I-TQJ |
| 厂商： | SILICON STORAGE TECHNOLOGY INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | MS-026ACB, TQFP-44 |
| 文件页数： | 4/9页 |
| 文件大小： | 112K |
| 代理商： | SST89E54RC-40-I-TQJ |
4
Preliminary Specifications
FlashFlex51 MCU
SST89E51RC / SST89E52RC / SST89E54RC
SST89V51RC / SST89V52RC / SST89V54RC
2005 Silicon Storage Technology, Inc.
S71259(01)-00-000
2/05
2.1 Pin Descriptions
TABLE
2-1: PIN DESCRIPTIONS (1 OF 2)
Symbol
Type1
Name and Functions
P0[7:0]
I/O
Port 0: Port 0 is an 8-bit open drain bi-directional I/O port. As an output port each pin can
sink several LS TTL inputs. Port 0 pins that have ‘1’s written to them float, and in this state
can be used as high-impedance inputs. Port 0 is also the multiplexed low-order address and
data bus during accesses to external code and data memory. In this application, it uses
strong internal pull-ups when transitioning to ‘1’s. Port 0 also receives the code bytes during
the external host mode programming, and outputs the code bytes during the external host
mode verification. External pull-ups are required during program verification or as a general
purpose I/O port.
P1[7:0]
I/O with internal
pull-up
Port 1: Port 1 is an 8-bit bi-directional I/O port with internal pull-ups. The Port 1 output buffers
can drive LS TTL inputs. Port 1 pins are pulled high by the internal pull-ups when ‘1’s are writ-
ten to them and can be used as inputs in this state. As inputs, Port 1 pins that are externally
pulled low will source current because of the internal pull-ups. P1[5, 6, 7] have high current
drive of 16 mA. Port 1 also receives the low-order address byte during the external host mode
programming and verification.
P1[0]
I/O
T2: External count input to Timer/Counter 2 or Clock-out from Timer/Counter 2
P1[1]
I
T2EX: Timer/Counter 2 capture/reload trigger and direction control
P1[2]
I
ECI: External Clock Input
This signal is the external clock input for the PCA.
P1[3]
I/O
CEX0: Capture/Compare External I/O for PCA Module 0
Each capture/compare module connects to a Port 1 pin for external I/O.
When not used by the PCA, this pin can handle standard I/O.
P1[4]
I/O
SS#: Slave port select input for SPI
OR
CEX1: Capture/Compare External I/O for PCA Module 1
P1[5]
I/O
MOSI: Master Output line, Slave Input line for SPI
OR
CEX2: Capture/Compare External I/O for PCA Module 2
P1[6]
I/O
MISO: Master Input line, Slave Output line for SPI
OR
CEX3: Capture/Compare External I/O for PCA Module 3
P1[7]
I/O
SCK: Master clock output, slave clock input line for SPI
OR
CEX4: Capture/Compare External I/O for PCA Module 4
P2[7:0]
I/O
with internal
pull-up
Port 2: Port 2 is an 8-bit bi-directional I/O port with internal pull-ups. Port 2 pins are pulled
high by the internal pull-ups when ‘1’s are written to them and can be used as inputs in this
state. As inputs, Port 2 pins that are externally pulled low will source current because of the
internal pull-ups. Port 2 sends the high-order address byte during fetches from external pro-
gram memory and during accesses to external Data Memory that use 16-bit address
(MOVX@DPTR). In this application, it uses strong internal pull-ups when transitioning to ‘1’s.
Port 2 also receives the high-order address byte during the external host mode programming
and verification.
P3[7:0]
I/O
with internal
pull-up
Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. The Port 3 output buffers
can drive LS TTL inputs. Port 3 pins are pulled high by the internal pull-ups when ‘1’s are writ-
ten to them and can be used as inputs in this state. As inputs, Port 3 pins that are externally
pulled low will source current because of the internal pull-ups. Port 3 also receives the high-
order address byte during the external host mode programming and verification.
P3[0]
I
RXD: Universal Asynchronous Receiver/Transmitter (UART) - Receive input
P3[1]
O
TXD: UART - Transmit output
P3[2]
I
INT0#: External Interrupt 0 Input
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SST89E54RD | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex MCU |
| SST89E54RD2 | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E54RD2/RD | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E54RD2-33-C-NI | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
| SST89E54RD2-33-C-NIE1 | 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:FlashFlex51 MCU |
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