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參數(shù)資料
| 型號： | HMS81C43XX |
| 廠商： | Hynix Semiconductor Inc. |
| 英文描述： | CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR TELEVISION |
| 中文描述： | CMOS單芯片8位單片機電視 |
| 文件頁數(shù)： | 24/100頁 |
| 文件大?。?/td> | 1943K |
| 代理商： | HMS81C43XX |
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HMS81C43xx / GMS87C4060
24
November 2001 ver 1.2
8.3 Data Memory
Figure 8-8 shows the internal Data Memory space availa-
ble. Data Memory is divided into four groups, a user RAM,
control registers, Stack, and OSD memory.
Figure 8-8 Data Memory Map
User Memory
The GMS87C4060 has 1,536
×
8 bits for the user memory
(RAM). HMS81C4332 has 512 x 8 bit for the user mem-
ory (RAM) addressed 000H ~ 23FH except
Peripheral Reg. (64
bytes)
. HMS81C4308/16/24 has 256 x 8 bit RAM ad-
dressed 000H ~ 13FH except peripheral register
(0C0h~0FFh)
Control Registers
The control registers are used by the CPU and Peripheral
function blocks for controlling the desired operation of the
device. Therefore these registers contain control and status
bits for the interrupt system, the timer/ counters, analog to
digital converters and I/O ports. The basic control registers
are in address range of 00C0
H
to 00FF
H
. And OSD control
registers are assigned within 0AE0
H
~ 0AFF
H
.
Note that unoccupied addresses may not be implemented
on the chip. Read accesses to these addresses will in gen-
eral return random data, and write accesses will have an in-
determinate effect.
More detailed informations of each register are explained
in each peripheral section.
Note:
Write only registers can not be accessed by bit ma-
nipulation instruction. Do not use read-modify-write instruc-
tion. Use byte manipulation instruction.
Example; To write at CKCTLR
LDM
CLCTLR,#09H ;Divide ratio
÷
8
Stack Area
The stack provides the area where the return address is
saved before a jump is performed during the processing
routine at the execution of a subroutine call instruction or
the acceptance of an interrupt.
When returning from the processing routine, executing the
subroutine return instruction [RET] restores the contents of
the program counter from the stack; executing the interrupt
return instruction [RETI] restores the contents of the pro-
gram counter and flags.
The save/restore locations in the stack are determined by
the stack pointed (SP). The SP is automatically decreased
after the saving, and increased before the restoring. This
means the value of the SP indicates the stack location
number for the next save. Refer to Figure 8-4 on page 20.
Page0
RAM (192 bytes)
Peripheral Reg. (64 bytes)
0100H
00C0H
0000H
RAM (256 bytes)
Stack area
0200H
RAM (256 bytes)
0300H
RAM (256 bytes)
0400H
RAM (256 bytes)
0500H
RAM (256 bytes)
0600H
063FH
RAM (64 bytes)
0A00H
OSD RAM (192 bytes)
0AE0H
Peripheral Reg. (32 bytes)
0C00H
0C5FH
Sprite RAM (96 bytes)
Empty area
Page1
Page2
Page3
Page4
Page5
Page6
PageA
PageC
Address
Symbol
R/W
Reset Value
Addressing
mode
00C0H
00C1H
00C2H
00C3H
00C4H
00C5H
00C8H
00C9H
00CAH
00CBH
00CCH
00CDH
00CEH
00CFH
R0
R0DD
R1
R1DD
R2
R2DD
R4
R4DD
R5
R5DD
R6
R6DD
FUNC1
FUNC2
R/W
W
R/W
W
R/W
W
R/W
W
R/W
W
R/W
W
W
W
00000000
00000000
00000000
0000----
----0000
-------
0-------
-0000000
---00000
byte, bit
1
byte
2
byte, bit
byte
byte, bit
byte
byte, bit
byte
byte, bit
byte
byte, bit
byte
byte
byte
Table 8-1Control registers
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| HMS81C4460 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS |
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