參數(shù)資料
型號(hào): S1C621A0F0A0100
元件分類: 微控制器/微處理器
英文描述: MICROCONTROLLER, PQFP80
封裝: QFP-80
文件頁數(shù): 86/161頁
文件大?。?/td> 1037K
代理商: S1C621A0F0A0100
I-6
EPSON
S1C621A0 TECHNICAL HARDWARE
CHAPTER 2: CPU, ROM AND RAM
CHAPTER 2
CPU, ROM AND RAM
2.1 CPU
The S1C621A0 uses an S1C6200A 4-bit CPU as the core
and therefore has nearly the same register composition and
instruction set as other family processors using the
S1C6200A core CPU. (For details of the S1C6200A, see the
"S1C6200/6200A Core CPU Manual".)
Due to features such as the ROM/RAM size and two clock
operating modes, the S1C621A0 differs from the S1C6200A
in the following points:
(1) The index registers IX and IY each consist of 8 bits as the
RAM can be addressed on a 8-bit basis. (The register has
no 4-bit page part.) Therefore, the instructions relating to
XP and YP ("PUSH XP", "PUSH YP", "LD XP,r", "LD
YP,r", "LD r,XP" and "LD r,YP") cannot be used with the
S1C621A0.
(2) The S1C621A0 does not support the sleep mode. The SLP
instruction is therefore unavailable with the S1C621A0.
(3) Since the ROM had a size of 4,096 words, no bank bit is
required. The S1C621A0 thus uses no PCB or NBP
registers.
2.2 ROM
The S1C621A0 has a mask ROM for storage of programs.
Its size is 4,096 words
× 12 bits.
The program area consists of 16 pages, each having 256
steps. After initial reset, the program starting address is
page 1, step 0. The interrupt vector addresses range from
steps 01H to 0FH of page 1.
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