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參數(shù)資料
| 型號： | PIC16F785 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 20-Pin Flash-Based 8-Bit CMOS Microcontroller with Two-Phase Asychronous Feedback PWM, Dual High-Speed Comparators and Dual Operational Amplifiers |
| 中文描述： | 20引腳基于閃存的8兩相異步反饋的PWM，雙高位CMOS微控制器的高速比較器和雙運(yùn)算放大器 |
| 文件頁數(shù)： | 11/178頁 |
| 文件大?。?/td> | 1620K |
| 代理商： | PIC16F785 |
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2004 Microchip Technology Inc.
Preliminary
DS41249A-page 9
PIC16F785
2.0
MEMORY ORGANIZATION
2.1
Program Memory Organization
The PIC16F785 has a 13-bit program counter capable
of addressing an 8k x 14 program memory space. Only
the first 2k x 14 (0000h–07FFh) for the PIC16F785 is
physically implemented. Accessing a location above
these boundaries will cause a wrap around within the
first 2k x 14 space. The Reset vector is at 0000h and
the interrupt vector is at 0004h (see Figure 2-1).
FIGURE 2-1:
PROGRAM MEMORY MAP
AND STACK FOR THE
PIC16F785
2.2
Data Memory Organization
The data memory (see Figure 2-2) is partitioned into
four banks, which contain the General Purpose
Registers (GPR) and the Special Function Registers
(SFR). The Special Function Registers are located in
the first 32 locations of each bank. Register locations
20h – 7Fh in Bank 0 and A0h – BFh in Bank 1 are
General Purpose Registers, implemented as static
RAM. The last sixteen register locations in Bank 1
(F0h – FFh), Bank 2 (170h – 17Fh), and Bank 3
(1F0h – 1FFh) point to addresses 70h – 7Fh in Bank 0.
All other RAM is unimplemented and returns ‘
0
’ when
read.
Seven address bits are required to access any location
in a data memory bank. Two additional bits are required
to access the four banks. When data memory is
accessed directly, the seven least significant address
bits are contained within the opcode and the two most
significant bits are contained in the Status register. RP0
and RP1 (Status<5> and Status<6>) are the two most
significant data memory address bits and are also
known as the bank select bits. Table 2-1 lists how to
access the four banks of registers.
TABLE 2-1:
2.2.1
GENERAL PURPOSE REGISTER
FILE
The register file banks are organized as 128 x 8 in the
PIC16F785. Each register is accessed, either directly,
by seven address bits within the opcode, or indirectly,
through the File Select Register, FSR. When the FSR
is used to access data memory, the eight least signifi-
cant data memory address bits are contained in the
FSR and the ninth most significant address bit is con-
tained in the IRP bit (Status<7>) of the Status register.
(See
Section 2.4 “Indirect Addressing, INDF and
FSR Registers”
).
2.2.2
SPECIAL FUNCTION REGISTERS
The Special Function Registers are registers used by
the CPU and peripheral functions for controlling the
desired operation of the device (see Table 2-2). These
registers are static RAM.
The special registers can be classified into two sets:
core and peripheral. The Special Function Registers
associated with the “core” are described in this section.
Those related to the operation of the peripheral
features are described in the section of that peripheral
feature.
PC<12:0>
13
000H
0004
0005
07FFH
0800H
1FFFH
STACK LEVEL 1
STACK LEVEL 2
STACK LEVEL 8
RESET VECTOR
INTERRUPT VECTOR
ON-CHIP PROGRAM
MEMORY
CALL, RETURN
RETFIE, RETLW
BANK SELECTION
RP1
RP0
Bank0
Bank1
Bank2
Bank3
0
0
1
1
0
1
0
1
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|---|---|
| PIC16F785-E/ML | 功能描述:8位微控制器 -MCU 3.5 KB 128 RAM 18I/O 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 |
| PIC16F785-E/P | 功能描述:8位微控制器 -MCU 14KB 368 RAM 33 I/O 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 |
| PIC16F785-E/SO | 功能描述:8位微控制器 -MCU 3.5KB FL 128R 18 I/O 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 |
| PIC16F785-E/SS | 功能描述:8位微控制器 -MCU 3.5KB FL 128R 18 I/O 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 |
| PIC16F785-I/ML | 功能描述:8位微控制器 -MCU 3.5 KB 128 RAM 18I/O 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 |
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