參數(shù)資料
型號: SST89E54RC-33-C-PIE
廠商: Microchip Technology
文件頁數(shù): 36/71頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 17KB FLASH 40PDIP
標(biāo)準(zhǔn)包裝: 9
系列: FlashFlex®
核心處理器: 8051
芯體尺寸: 8-位
速度: 33MHz
連通性: EBI/EMI,UART/USART
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: 閃存
EEPROM 大小: 1K x 8
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
2011 Silicon Storage Technology, Inc.
DS25088A
10/11
41
FlashFlex MCU
SST89E52RC / SST89E54RC
Data Sheet
A Microchip Technology Company
The user could use the possible addresses above to select slave 3 only. Another combination could be
to select slave 2 and 3 only as shown below.
More than one slave may have the same SADDR address as well, and a given address could be used
to modify the address so that it is unique.
Using the Broadcast Address to Select Slaves
Using the broadcast address, the master can communicate with all the slaves at once. It is formed by
performing a logical OR of SADDR and SADEN with 0s in the result treated as “don’t cares”.
“Don’t cares” allow for a wider range in defining the broadcast address, but in most cases, the broad-
cast address will be FFH.
On reset, SADDR and SADEN are “0”. This produces an given address of all “don’t cares” as well as a
broadcast address of all “don’t cares.” This effectively disables Automatic Addressing mode and allows
the microcontroller to function as a standard 8051, which does not make use of this feature.
Select Slave 3 Only
Slave 2
Given Address
Possible Addresses
1111 X0X1
1111 1011
1111 1001
Select Slaves 2 and 3 Only
Slaves 2 and 3
Possible Addresses
1111 0011
Slave 1
1111 0001 =
SADDR
+1111 1010 =
SADEN
1111 1X11 =
Broadcast
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