參數(shù)資料
型號： GMS87C7216Q
廠商： Electronic Theatre Controls, Inc.
元件分類： 8位微控制器
英文描述： 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 8位單晶片微控制器
文件頁數(shù)： 27/121頁
文件大小： 1645K
代理商： GMS87C7216Q
GMS81C7208/7216
FEB. 2005 Ver 1.04
23
8.3 Data Memory
Figure 8-8 shows the internal Data Memory space available. Data
Memory is divided into four groups, a user RAM, control regis-
ters, Stack, and LCD memory.
Figure 8-8 Data Memory Map
User Memory
The both GMS81C7208/16 has 448
×
8 bits for the user memory
(RAM).
There are two page internal RAM. Page is selected by G-flag and
RAM page selection register RPR. When G-flag is cleared to “0”,
always page 0 is selected regardless of RPR value. If G-flag is set
to “1”, page will be selected according to RPR value.
Figure 8-9 RAM Page Configuration
Control Registers
The control registers are used by the CPU and Peripheral function
blocks for controlling the desired operation of the device. There-
fore these registers contain control and status bits for the interrupt
system, the Timer/Counters, analog to digital converters and I/O
ports. The control registers are in address range of 0C0
H
to 0FF
H
.
Note that unoccupied addresses may not be implemented on the
chip. Read accesses to these addresses will in general return ran-
dom data, and write accesses will have an indeterminate 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 (SET1, CLR1). Do not use read-mod-
ify-write instruction. Use byte manipulation instruction, for
example “LDM”.
Example; To write at CKCTLR
LDM
CKCTLR,#09H
;Divide ratio(
÷
16)
Stack Area
The stack provides the area where the return address is saved be-
fore a jump is performed during the processing routine at the ex-
ecution of a subroutine call instruction or the acceptance of an
interrupt.
When returning from the processing routine, executing the sub-
routine return instruction [RET] restores the contents of the pro-
gram counter from the stack; executing the interrupt return
instruction [RETI] restores the contents of the program 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 19.
User Memory
(192 Bytes)
Control
Registers
or Stack Area
(229 Bytes)
0000
H
00BF
H
00C0
H
00FF
H
0100
H
011A
H
011B
H
01FF
H
PAGE0
User Memory
PAGE1
LCD display RAM
(27 Nibbles)
Page 0
Page 0: 00~FF
H
Page 1: 100~1FF
H
Page 1
RPR=1, G=1
G=0
相關(guān)PDF資料
PDF描述
GMS87C7216LQ 8-BIT SINGLE-CHIP MICROCONTROLLERS
GNR20D101K VARISTOR
GNR20D102K VARISTOR
GNR20D112K VARISTOR
GNR20D121K VARISTOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
GM-S-88 功能描述:以太網(wǎng)和電信連接器 8P8C R/A PCB SHIELD LOW PROFILE BLACK RoHS:否 制造商:Pulse 產(chǎn)品:Modular Jacks 性能類別: USOC 代碼:RJ45 位置/觸點(diǎn)數(shù)量: 安裝風(fēng)格:Through Hole 端口數(shù)量:1 x 1 型式:Female 屏蔽: 電流額定值: 電壓額定值: 觸點(diǎn)電鍍: 外殼材料:Thermoplastic IP 等級:
GM-S-88-50 功能描述:以太網(wǎng)和電信連接器 8P8C R/A PCB SHIELD LOW PROFILE BLK 50u RoHS:否 制造商:Pulse 產(chǎn)品:Modular Jacks 性能類別: USOC 代碼:RJ45 位置/觸點(diǎn)數(shù)量: 安裝風(fēng)格:Through Hole 端口數(shù)量:1 x 1 型式:Female 屏蔽: 電流額定值: 電壓額定值: 觸點(diǎn)電鍍: 外殼材料:Thermoplastic IP 等級:
GMS90 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS
GMS90C31 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
GMS90C32 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*