参数资料
型号: SST89C58RC-40-C-QIF-T
厂商: Microchip Technology
文件页数: 78/88页
文件大小: 0K
描述: IC MCU 8BIT FLASH 40WQFN
标准包装: 3,000
系列: FlashFlex®
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: EBI/EMI,I²C,SMBus,UART/USART
外围设备: 欠压检测/复位,POR,WDT
输入/输出数: 32
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 40-WFQFN 裸露焊盘
包装: 带卷 (TR)
2011 Silicon Storage Technology, Inc.
DS25100A
12/11
8
FlashFlex MCU
SST89C58RC
Data Sheet
A Microchip Technology Company
I/O Descriptions
The device supports 2.7–5.5V supply, and the I/O pins can tolerate VDD +0.5V. However, applying any
voltage beyond power supply in quai-bidirectional mode is not recommended because doing so
causes current to flow from the pin to VDD which consumes extra power.
EA#
I
External Access Enable: EA# must be connected to VSS in order to enable the
device to fetch code from the external program memory. EA# must be strapped to VDD
for internal program execution. However, Disable-Extern-Boot (See Section , “Security
Lock”) will disable EA#, and program execution is only possible from internal program
memory.
ALE/
PROG#
I/O
Address Latch Enable: ALE is the output signal for latching the low byte of the
address during an access to external memory. This pin is also the programming pulse
input (PROG#) for flash programming. Normally the ALE2 is emitted at a constant rate
of 1/6 the crystal frequency3. One ALE pulse is skipped during each access to exter-
nal data memory. However, if AO is set to ‘1’, ALE is disabled.
NC
I/O
No Connect
XTAL1
I
Crystal 1: Input to the inverting oscillator amplifier and input to the internal clock gen-
erator circuits.
XTAL2
O
Crystal 2: Output from the inverting oscillator amplifier.
VDD
I
Power Supply
VSS
I
Ground
T0-0.0 25100
1. I = Input; O = Output
2.ALE loading issue: When ALE pin experiences higher loading (>30pf) during the reset, the MCU may accidentally enter
into modes other than normal working mode. The solution is to add a pull-up resistor of 3-50 K
to V
DD, e.g. for ALE
pin.
3. For 6 clock mode, ALE is emitted at 1/3 of crystal frequency.
Table 1: Pin Descriptions (Continued) (2 of 2)
Symbol
Type1
Name and Functions
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