參數(shù)資料
型號: AT90LS2343-1PC
廠商: Atmel
文件頁數(shù): 16/63頁
文件大小: 0K
描述: IC MCU 2K FLASH 1MHZ COM 8-DIP
標(biāo)準(zhǔn)包裝: 50
系列: AVR® 90LS
核心處理器: AVR
芯體尺寸: 8-位
速度: 1MHz
連通性: SPI
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 5
程序存儲器容量: 2KB(1K x 16)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 128 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 6 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 8-DIP(0.300",7.62mm)
包裝: 管件
PIC16C433
DS41139B-page 22
Preliminary
2002 Microchip Technology Inc.
4.3
PCL and PCLATH
The Program Counter (PC) is 13-bits wide. The low
byte comes from the PCL Register, which is a readable
and writable register. The high byte (PC<12:8>) is not
directly readable or writable and comes from PCLATH.
On any RESET, the PC is cleared. Figure 4-3 shows
the two situations for the loading of the PC. The upper
example in Figure 4-3 shows how the PC is loaded on
a write to PCL (PCLATH<4:0>
→ PCH). The lower
example in Figure 4-3 shows how the PC is loaded dur-
ing a CALL or GOTO instruction (PCLATH<4:3>
PCH).
FIGURE 4-3:
LOADING OF PC IN
DIFFERENT SITUATIONS
4.3.1
COMPUTED GOTO
A Computed GOTO is accomplished by adding an offset
to the program counter (ADDWF PCL). When doing a
table read using a computed GOTO method, care
should be exercised if the table location crosses a PCL
memory boundary (each 256 byte block). Refer to the
application note “Implementing a Table Read" (AN556).
4.3.2
STACK
The PIC16C433 family has an 8-level deep x 13-bit
wide hardware stack. The stack space is not part of
either program or data space and the stack pointer is
not readable or writable. The PC is PUSHed onto the
stack when a CALL instruction is executed, or an inter-
rupt causes a branch. The stack is POPed in the event
of a RETURN, RETLW or a RETFIE instruction execu-
tion. PCLATH is not affected by a PUSH or POP oper-
ation.
The stack operates as a circular buffer. This means that
after the stack has been PUSHed eight times, the ninth
push overwrites the value that was stored from the first
push. The tenth push overwrites the second push (and
so on).
4.4
Program Memory Paging
The
PIC16C433
ignores
both
paging
bits
PCLATH<4:3>, which are used to access program
memory when more than one page is available. The
use of PCLATH<4:3> as general purpose read/write
bits for the PIC16C433 is not recommended, since this
may affect upward compatibility with future products.
PC
12
8
7
0
5
PCLATH<4:0>
PCLATH
Instruction with
ALU Result
GOTO, CALL
Opcode <10:0>
8
PC
12
11 10
0
11
PCLATH<4:3>
PCH
PCL
87
2
PCLATH
PCH
PCL
PCL as
Destination
Note 1: There are no status bits to indicate stack
overflow or stack underflow conditions.
2: There are no instructions/mnemonics
called PUSH or POP. These are actions
that occur from the execution of the
CALL, RETURN, RETLW,
and RETFIE
instructions, or the vectoring to an inter-
rupt address.
相關(guān)PDF資料
PDF描述
AT89S52-24PI IC MCU 8K FLASH 24MHZ 40-DIP
DSPIC33FJ32MC202-I/SS IC DSPIC MCU/DSP 32K 28SSOP
PIC18LF46J13-I/ML IC PIC MCU 64KB FLASH 44QFN
52892-1890 CONN FFC 18POS .50MM R/A ZIF SMD
AT89C51RC2-RLTIM IC 8051 MCU FLASH 32K 44VQFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT90LS2343-1PI 功能描述:IC MCU 2K FLASH 1MHZ IND 8-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:AVR® 90LS 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR,WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB(32K x 8) 程序存儲器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP(0.600",15.24mm) 包裝:管件
AT90LS2343-1SC 功能描述:IC MCU 2K FLASH 1MHZ COM 8-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:AVR® 90LS 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR,WDT 輸入/輸出數(shù):32 程序存儲器容量:32KB(32K x 8) 程序存儲器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP(0.600",15.24mm) 包裝:管件
AT90LS2343-1SI 功能描述:8位微控制器 -MCU 2k bit RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90LS2343-4PC 功能描述:8位微控制器 -MCU 2k bit RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
AT90LS2343-4PI 功能描述:8位微控制器 -MCU 2k bit RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT