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参数资料
型号： ST62T18CM3
英文描述： 8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. A/D CONVERTER. 8-BIT AUTO-RELOAD TIMER. UART. OSG. SAFE RESET AND 20 PINS
中文描述： 8位微控制器（MCU）的与检察官办公室。光盘。 FASTROM。的A / D转换器。 8位自动重加载定时器。 UART的。业务支助。安全复位和20图钉
文件页数： 12/82页
文件大小： 870K
代理商： ST62T18CM3
12/82
ST62T18C/E18C
MEMORY MAP
(Cont’d)
1.3.6 Data RAM Bank Register (DRBR)
Address: CBh
—
Write only
Bit 7-5 = These bits are not used
Bit 4
-
DRBR4
. This bit, when set, selects RAM
Page 2.
Bit 3 -
DRBR3
. This bit, when set, selects RAM
Page 1.
Bit 2.0 These bits are not used.
The selection of the bank is made by programming
the Data RAM Bank Switch register (DRBR regis-
ter) located at address CBh of the Data Space ac-
cording to Table 1. No more than one bank should
be set at a time.
The DRBR register can be addressed like a RAM
Data Space location at the address CBh; never-
theless it is a write only register that cannot be ac-
cessed with single-bit operations. This register is
used to select the desired 64-byte RAM bank of
the Data Space. The number of banks has to be
loaded in the DRBR register and the instruction
has to point to the selected location as if it was in
bank 0 (from 00h address to 3Fh address).
This register is not cleared during the MCU initiali-
zation, therefore it must be written before the first
access to the Data Space bank region. Refer to
the Data Space description for additional informa-
tion. The DRBR register is not modified when an
interrupt or a subroutine occurs.
Notes
:
Care is required when handling the DRBR register
as it is write only. For this reason, it is not allowed
to change the DRBR contents while executing in-
terrupt service routine, as the service routine can-
not save and then restore its previous content. If it
is impossible to avoid the writing of this register in
interrupt service routine, an image of this register
must be saved in a RAM location, and each time
the program writes to DRBR it must write also to
the image register. The image register must be
written first, so if an interrupt occurs between the
two instructions the DRBR is not affected.
In DRBR Register, only 1 bit must be set. Other-
wise two or more pages are enabled in parallel,
producing errors.
Table 5. Data RAM Bank Register Set-up
7
0
-
-
-
DRBR4 DRBR3
-
-
-
DRBR
00h
01h
02h
08h
10h
other
ST62T18C/E18C
None
Reserved
Reserved
RAM Page 1
RAM Page 2
Reserved
12
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相关代理商/技术参数
参数描述
ST62T18CM6 功能描述:8位微控制器 -MCU OTP EPROM 8K SPI/UAR RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST62T20CB3 功能描述:8位微控制器 -MCU ST6208C ST6209C ST6220C 8B MCU RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST62T20CB6 功能描述:8位微控制器 -MCU OTP EPROM 4K No Intf RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
ST62T20CB6 制造商:STMicroelectronics 功能描述:IC 8BIT MCU OTP 4K 62T20 DIP20
ST62T20CM6 功能描述:8位微控制器 -MCU OTP EPROM 4K No Intf RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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