參數(shù)資料
型號(hào): UPD17149CTA1
廠商: NEC Corp.
英文描述: SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 小,通用4位單晶片微控制器
文件頁數(shù): 27/102頁
文件大?。?/td> 408K
代理商: UPD17149CTA1
27
μ
PD17145(A1), 17147(A1), 17149(A1)
9.2 Function of Data Buffer
The data buffer has two main functions.
One is to transfer data with the peripheral hardware, and the other is to read the constant data on the program
memory (table reference). Figure 9-3 shows the relationships between the data buffer and peripheral hardware.
Figure 9-3. Data Buffer and Peripheral Hardware
01H
02H
03H
04H
40H
45H
Shift register (SIOSFR)
Timer 0 modulo register (TM0M)
Timer 1 modulo register (TM1M)
A/D converter data
register (ADCR)
Address register (AR)
Timer 0 timer 1 count
register (TM0TM1C)
Data buffer
(DBF)
Internal bus
Program memory
(ROM)
Constant data
Peripheral address
Peripheral hardware
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