- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383012 > GMS87C7216LQ (Electronic Theatre Controls, Inc.) 8-BIT SINGLE-CHIP MICROCONTROLLERS PDF資料下載
參數(shù)資料
| 型號： | GMS87C7216LQ |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 數(shù)學處理器 |
| 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)： | 21/121頁 |
| 文件大小： | 1645K |
| 代理商： | GMS87C7216LQ |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁
GMS81C7208/7216
FEB. 2005 Ver 1.04
17
8. MEMORY ORGANIZATION
The GMS81C7208/16 has separate address spaces for Program
memory and Data Memory. Program memory can only be read,
not written to. It can be up to 8K/16K bytes of Program memory.
Data memory can be read and written to up to 448 bytes including
the stack area and the LCD display RAM area.
8.1 Registers
This device has six registers that are the Program Counter (PC),
a Accumulator (A), two index registers (X, Y), the Stack Pointer
(SP), and the Program Status Word (PSW). The Program Counter
consists of 16-bit register.
Figure 8-1 Configuration of Registers
Accumulator:
The Accumulator is the 8-bit general purpose reg-
ister, used for data operation such as transfer, temporary saving,
and conditional judgement, etc.
The Accumulator can be used as a 16-bit register with Y Register
as shown below.
Figure 8-2 Configuration of YA 16-bit Register
X, Y Registers
: In the addressing mode which uses these index
registers, the register contents are added to the specified address,
which becomes the actual address. These modes are extremely ef-
fective for referencing subroutine tables and memory tables. The
index registers also have increment, decrement, comparison and
data transfer functions, and they can be used as simple accumula-
tors.
Stack Pointer
: The Stack Pointer is an 8-bit register used for oc-
currence interrupts and calling out subroutines. Stack Pointer
identifies the location in the stack to be access (save or restore).
Generally, SP is automatically updated when a subroutine call is
executed or an interrupt is accepted. However, if it is used in ex-
cess of the stack area permitted by the data memory allocating
configuration, the user-processed data may be lost.
The stack can be located at any position within 011B
H
to 01FF
H
of the internal data memory. The SP is not initialized by hard-
ware, requiring to write the initial value (the location with which
the use of the stack starts) by using the initialization routine. Nor-
mally, the initial value of “FF
H
” is used.
Note:
The Stack Pointer must be initialized by software be-
cause its value is undefined after RESET.
Example: To initialize the SP
LDX
TXSP
#0FFH
; SP
←
FFH
Program Counter
: The Program Counter is a 16-bit wide which
consists of two 8-bit registers, PCH and PCL. This counter indi-
cates the address of the next instruction to be executed. In reset
state, the program counter has reset routine address (PC
H
:0FF
H
,
PC
L
:0FE
H
).
Program Status Word
: The Program Status Word (PSW) con-
tains several bits that reflect the current state of the CPU. The
PSW is described in Figure 8-3. It contains the Negative flag, the
Overflow flag, the Break flag the Half Carry (for BCD opera-
tion), the Interrupt enable flag, the Zero flag, and the Carry flag.
[Carry flag C]
This flag stores any carry or not borrow from the ALU of CPU
after an arithmetic operation and is also changed by the Shift In-
struction or Rotate Instruction.
[Zero flag Z]
This flag is set when the result of an arithmetic operation or data
transfer is “0” and is cleared by any other result.
ACCUMULATOR
X REGISTER
Y REGISTER
STACK POINTER
PROGRAM COUNTER
PROGRAM STATUS
WORD
X
A
SP
Y
PCL
PSW
PCH
Two 8-bit Registers can be used as a “YA” 16-bit Register
Y
A
Y
A
SP
01
H
Stack Area (100
H
~ 1FF
H
)
8 7
Bit 15
Bit 0
Hardware Fixed
00
H
~FF
H
LCD display RAM area is located in 100
H
~11A
H
,
User must have concerning that Stack data does not
cross over LCD RAM area.
SP (Stack Pointer) could be in 00
H
~FF
H
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| GNR20D101K | VARISTOR |
| GNR20D102K | VARISTOR |
| GNR20D112K | VARISTOR |
| GNR20D121K | VARISTOR |
| GNR20D151K | VARISTOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GMS87C7216Q | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
| 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/觸點數(shù)量: 安裝風格: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/觸點數(shù)量: 安裝風格: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 |
發(fā)布緊急采購，3分鐘左右您將得到回復。