參數(shù)資料
型號： UPD17201A
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
中文描述： 4位單片機與LCD控制器/驅動器和A / D轉換器紅外遙控遞質
文件頁數(shù)： 17/120頁
文件大?。?/td> 516K
代理商： UPD17201A
μ
PD17201A, 17207
17
4.4.
DATA MEMORY (RAM)
Data memory (random access memory) stores data for operations and control. It can be read-/write-accessed by
instructions.
4.4.1
Memory Configuration
Figure 4-4 shows the configuration of the data memory (RAM).
The data memory consists of three “banks”: BANK0, BANK1, and BANK2.
In each bank, every 4 bits of data is assigned an address. The higher 3 bits of the address indicate a “row address”
and the lower 4 bits of the address indicate a “column address”. For example, a data memory location indicated by
row address 1H and column address 0AH is termed a data memory location at address 1AH. Each address stores
data of 4 bits (= a “nibble”).
In addition, the data memory is divided into following six functional blocks:
(1) System register (SYSREG)
A system register (SYSREG) is resident on addresses 74H to 7FH (12 nibbles long) of each bank. In other
nibbles, each bank has a system register at its addresses 74H to 7FH.
(2) Data buffer (DBF)
A data buffer is resident on addresses 0CH to 0FH (4 nibbles long) of bank 0 of data memory.
The reset value is 0320H.
(3) General register (GR)
A general register is resident on any row (16 nibbles long) of any bank of data memory.
The row address of the general register is indicated by the general pointer (RP) in the system register
(SYSREG).
(4) LCD segment data register (LCD register)
A register sets the segment output data of LCD.
Refer to
11. LCD CONTROLLER/DRIVER
.
An LCD segment data register is resident on addresses 40H to 63H (36 nibbles long) of BANK0 of data memory.
(5) Port register
A port data register is resident on addresses 70H to 73H (12 nibbles) of each bank of data memory.
However, addresses 71H to 73H of BANK1 and addresses 70H to 73H of BANK2 are assigned nothing.
Therefore, a port data register is substantially 4 nibbles long.
The reset value is 0.
相關PDF資料
PDF描述
UPD17201AGF 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
UPD17207 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
UPD17207GF 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
UPD17202AGF-011 Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No
UPD17202AGF-011-3BE Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No
相關代理商/技術參數(shù)
參數(shù)描述
UPD17201AGF 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
UPD17201AGF-XXX-3B9 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
UPD17202A 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UPD17202AGF-011 Preliminary Data Sheet | Data Sheet[05/1997]
UPD17202AGF-011 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND KEY SCAN CIRCUIT FOR FPC FRONT PANEL CONTROLLER
UPD17202AGF-011-3BE 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND KEY SCAN CIRCUIT FOR FPC FRONT PANEL CONTROLLER
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