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參數資料
| 型號： | W742C813 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4-BIT, MROM, 3.58 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-100 |
| 文件頁數： | 8/56頁 |
| 文件大小： | 455K |
| 代理商： | W742C813 |
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W742E/C813
- 8 -
5. FUNCTIONAL DESCRIPTION
5.1 Program Counter (PC)
Organized as an 15-bit binary counter (PC0 to PC14), the program counter generates the addresses of
the 32768(32K)
×
16 on-chip ROM containing the program instruction words. When the interrupt or
initial reset conditions are to be executed, the corresponding address will be loaded into the program
counter directly. From address 0000h to 0023h are reserved for reset and interrupt service routine. The
format used is shown below.
Table 1 Vector address and interrupt priority
ITEM
ADDRESS
0000H
0004H
0008H
000CH
0010H
0014H
0018H
001CH
0020H
0024H
INTERRUPT PRIORITY
Initial Reset
INT 0 (Divider0)
INT 1 (Timer 0)
INT 2 (Port RC)
INT 3 (Port 1.2 (/INT0))
INT 4 (Divider1)
INT 5 (Serial I/O)
INT 6 (Port1.3 (/INT1))
INT 7 (Timer 1)
Code Start
-
1st
2nd
3rd
4th
5th
6th
7th
8th
-
5.2 Stack Register (STACK)
The stack register is organized as 53 bits x 16 levels (first-in, last-out). When either a call subroutine or
an interrupt is executed, the program counter (PC), TAB0, TAB1, TAB2, TAB3, DBKRL, DBKRH WRP,
ROMPR, PAGE, ACC and CF will be pushed into the stack register automatically. At the end of a call
subroutine or an interrupt service subroutine, the
RTN
(only restore the program counter) and
RTN #I
instruction could pop the contents of the stack register into the corresponding registers. It can restore
part of contents of stack buffer. When the stack register is pushed over the 16th level, the contents of
the first level will be overwritten. In the other words, the stack register is always 16 levels deep. The bit
definition of #I is listed below.
I = 0000 0000
bit0 = 1
bit1 = 1
bit2 = 1
bit3 = 1
bit4 = 1
bit5 = 1
bit6 = 1
Pop PC from stack only
Pop
TAB0, TAB1, TAB2, TAB3
from stack
Pop
DBKRL, DBKRH
from stack
Pop
WRP
from stack
Pop
ROMPR
from stack
Pop
PAGE
from stack
Pop
ACC
from stack
Pop
CF
from stack
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相關代理商/技術參數 |
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