参数资料
型号: SST89C58RC-40-I-TQJE
厂商: Microchip Technology
文件页数: 42/88页
文件大小: 0K
描述: IC MCU 8BIT FLASH 40TQFP
标准包装: 160
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: -40°C ~ 85°C
封装/外壳: 44-TQFP
包装: 托盘
2011 Silicon Storage Technology, Inc.
DS25100A
12/11
47
FlashFlex MCU
SST89C58RC
Data Sheet
A Microchip Technology Company
If the user added a third slave such as the example below:
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.
Select Slave 2 Only
Slave 2
Given Address
Possible Addresses
1111 0XX1
1111 0111
1111 0011
Select Slaves 1 and 2
Slaves 1 and 2
Possible Addresses
1111 0001
1111 0101
Slave 1
Slave 2
Slave 3
SADDR
=
1111 0001
SADDR
=
1111 0011
SADDR
=
1111
SADEN
=
1111 1010
SADEN
=
1111 1001
SADEN
=
1111
GIVEN
= 1111 0X0X
GIVEN
= 1111 0XX1
GIVEN
=
1111
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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