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参数资料
| 型号： | ST624XB-DBE |
| 厂商： | 意法半导体 |
| 英文描述： | REAL TIME EMULATION DEVELOPMENT TOOLS FOR ST6 MCU FAMILY |
| 中文描述： | 实时仿真开发工具，ST6单片机系列 |
| 文件页数： | 12/74页 |
| 文件大小： | 733K |
| 代理商： | ST624XB-DBE |
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12/74
ST62T46B/E46B
MEMORY MAP
(Cont’d)
1.3.6 Data RAM/EEPROM 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.
Bit2. These bits are not used.
Bit 1 -
DRBR1
. This bit, when set, selects
EEPROM Page 1.
Bit 0 -
DRBR0
. This bit, when set, selects
EEPROM Page 0.
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 at the address CBh; nevertheless it is
a write only register that cannot be accessed with
single-bit operations. This register is used to select
the desired 64-byte RAM/EEPROM bank of the
Data Space. The number of banks has to be load-
ed 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 3. Data RAM Bank Register Set-up
7
0
-
-
-
DRBR4 DRBR3
-
DRBR1 DRBR0
DRBR
00h
01h
02h
08h
10h
other
ST62T46B/E46B
None
EEPROM Page 0
EEPROM Page 1
Not available
RAM Page 2
Reserved
相关PDF资料 |
PDF描述 |
|---|---|
| ST6263C | 8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. A/D CONVERTER. SAFE RESET. AUTO-RELOAD TIMER. EEPROM AND SPI |
| ST6265C | 8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. A/D CONVERTER. SAFE RESET. AUTO-RELOAD TIMER. EEPROM AND SPI |
| ST62E35BG1 | 8-BIT MICROCONTROLLER |
| ST62P08CM3 | 8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. A/D CONVERTER. OSCILLATOR SAFEGUARD. SAFE RESET AND 20 PINS |
| ST62P08CM6 | 8-BIT MICROCONTROLLER ( MCU ) WITH OTP. ROM. FASTROM. EPROM. A/D CONVERTER. OSCILLATOR SAFEGUARD. SAFE RESET AND 20 PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST624XB-KIT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:STARTER KIT DATASHEET FOR ST624X |
| ST624XB-KIT/110 | 功能描述:开发板和工具包 - 其他处理器 ST624X Starter Kit RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: |
| ST624XB-KIT/UK | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:ST62 KIT |
| ST6252 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER AND EEPROM |
| ST6252BB1 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER AND EEPROM |
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