您的位置：维库电子市场网 > Datasheet > PIC12CE674

PIC12CE674 Datasheet

  • PIC12CE674

  • 8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEP...

  • 1264.35KB

  • 129页

  • Microchip   Microchip

阅览下载 纠错 0

扫码查看芯片数据手册

上传产品规格书

PDF预览

PIC12CE67X
3.0
ARCHITECTURAL OVERVIEW
The high performance of the PIC12CE67X family can
be attributed to a number of architectural features com-
monly found in RISC microprocessors. To begin with,
the PIC12CE67X uses a Harvard architecture, in which
program and data are accessed from separate memo-
ries using separate buses. This improves bandwidth
over traditional von Neumann architecture in which pro-
gram and data are fetched from the same memory
using the same bus. Separating program and data
buses also allow instructions to be sized differently than
the 8-bit wide data word. Instruction opcodes are 14-
bits wide making it possible to have all single word
instructions. A 14-bit wide program memory access
bus fetches a 14-bit instruction in a single cycle. A two-
stage pipeline overlaps fetch and execution of instruc-
tions (Example 3-1). Consequently, all instructions (35)
execute in a single cycle (400 ns @ 10 MHz) except for
program branches.
The table below lists program memory (EPROM), data
memory (RAM), and non-volatile memory (EEPROM)
for each PIC12CE67X device.
Device
PIC12CE673
PIC12CE674
Program
Memory
1K x 14
2K x 14
RAM
Data
Memory
128 x 8
128 x 8
EEPROM
Data
Memory
16x8
16x8
The PIC12CE67X can directly or indirectly address its
register 铿乴es or data memory. All special function regis-
ters, including the program counter, are mapped in the
data memory. The PIC12CE67X has an orthogonal
(symmetrical) instruction set that makes it possible to
carry out any operation on any register using any
addressing mode. This symmetrical nature and lack of
鈥榮pecial optimal situations鈥?make programming with the
PIC12CE67X simple yet ef铿乧ient. In addition, the learn-
ing curve is reduced signi铿乧antly.
PIC12CE67X devices contain an 8-bit ALU and work-
ing register. The ALU is a general purpose arithmetic
unit. It performs arithmetic and Boolean functions
between the data in the working register and any regis-
ter 铿乴e.
The ALU is 8-bits wide and capable of addition, sub-
traction, shift and logical operations. Unless otherwise
mentioned, arithmetic operations are two's comple-
ment in nature. In two-operand instructions, typically
one operand is the working register (W register). The
other operand is a 铿乴e register or an immediate con-
stant. In single operand instructions, the operand is
either the W register or a 铿乴e register.
The W register is an 8-bit working register used for ALU
operations. It is not an addressable register.
Depending on the instruction executed, the ALU may
affect the values of the Carry (C), Digit Carry (DC), and
Zero (Z) bits in the STATUS register. The C and DC bits
operate as a borrow bit and a digit borrow out bit,
respectively, in subtraction. See the
SUBLW
and
SUBWF
instructions for examples.
漏
1998 Microchip Technology Inc.
Preliminary
DS40181B-page 7

PIC12CE674相关型号PDF文件下载

您可能感兴趣的PDF文件资料

热门IC型号推荐

©2024 维库电子市场网（www.dzsc.com）　备案号：浙B2-20050339-1 经营许可证：浙B2-20210386版权声明
买家服务热线：0571-85317607 | 买家服务部QQ： QQ:1609526468
卖家服务热线：0571-85317607 | 卖家服务部QQ： QQ:331652727

扫码下载APP，
一键连接广大的电子世界。

在线人工客服

买家服务：
卖家服务：

0571-85317607

客服在线时间周一至周五
9:00-17:30

关注官方微信号，
第一时间获取资讯。

建议反馈
返回顶部

建议反馈

联系人：

联系方式：

按住滑块，拖拽到最右边
>>
感谢您向阿库提出的宝贵意见，您的参与是维库提升服务的动力！意见一经采纳，将有感恩红包奉上哦！

PDF纠错X

投诉电话：0571-85317607 投诉QQ：

如选匿名将无法为您反馈投诉结果，建议实名投诉！