參數(shù)資料
型號： S3C1860XX-SK
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20
封裝： SOP-20
文件頁數(shù)： 2/95頁
文件大?。?/td> 339K
代理商： S3C1860XX-SK
S3C1860
3-9
DATA MEMORY (RAM)
The data memory of S3C1860 consists of a 32-nibble RAM which is organized into two files of 16 nibbles each
(See Figure 3-10).
RAM addressing is implemented by a 7-bit register, HL.
It's upper 3-bit register (H) selects one of two files and its lower 4-bit register (L) selects one of 16 nibbles in the
selected file.
Instructions which manipulate the H and L registers are as follow:
Select a file :
MOV
H,#n
; H
← #n, where n must be 0,4
NOT
H
; Complement MSB of H register
Select a nibble in a selected file :
MOV
L,A
; L
← A
MOV
L,@HL
; L
← M(H,L)
MOV
L,#n
; L
← #n, where 0 ≤ n ≤ 0FH
INCS
L
; L
← L + 1
DECS
L
; L
← L - 1
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