Figure 12 presents the block diagram of the MC68HC11 C. Port B Port C Control Port D Control Mode Control Interrupt Logic" />
參數(shù)資料
型號(hào): XR88C681CP/40
廠商: Exar Corporation
文件頁(yè)數(shù): 32/101頁(yè)
文件大?。?/td> 0K
描述: IC UART CMOS DUAL 40PDIP
產(chǎn)品變化通告: Leaded UART, V&I Obsolescence 11/Apr/2011
標(biāo)準(zhǔn)包裝: 9
特點(diǎn): *
通道數(shù): 2,DUART
FIFO's: 1 字節(jié),3 字節(jié)
電源電壓: 4.75 V ~ 5.25 V
帶并行端口:
帶CMOS:
安裝類型: 通孔
封裝/外殼: 40-DIP(0.600",15.24mm)
供應(yīng)商設(shè)備封裝: 40-PDIP
包裝: 管件
XR88C681
36
Rev. 2.11
Figure 12 presents the block diagram of the MC68HC11 C.
Port B
Port C
Control
Port D
Control
Mode Control
Interrupt
Logic
RAM 256 Bytes
Strobe and Handshake Parallel I/O
Oscillator
Clock Logic
A/D Converter
SCI
SPI
Timer
System
Bus Expansion
Address
Address/Data
-IRQ -XIRQ -RESET
CPU Core
E
XTAL EXTAL
MODA
MODB
Port A
Port E
VRH
VRL
8
Figure 12. Block Diagram of the MC68HC11 Microcontroller
S
*
S
C
K
M
O
S
I
M
IS
O
T
X
D
R
X
D
The 68HC11 can be configured to operate in a “Single
Chip” Mode or in an “Expanded Multiplexed Bus” mode. If
a device is configured to operate in the “Single Chip”
mode, the entire 64K bytes of Address space is internal to
the C IC.
Please note that this does not mean that there
is 64K bytes of memory, or other addressable portions
within the device. A 68HC11 MCU configured for “Single
Chip” mode operation cannot address any components
external to the MCU.
Therefore, if a user desired to
interface the DUART to this C, then the C must operate
in the “Expanded-Multiplexed” mode. The MC68HC11 is
configured into the Expanded Multiplexed mode by tying
both the MODA and MODB pin to Vcc, and then resetting
the device.
The MC68HC11 consists of 5 different multi-function
parallel ports. Each of these ports are briefly discussed.
Port A
Port A consists of 3 input pins, 4 output pins and 1
bi-directional pin. This port is used to support the Timer
System. One of the input pins can be used for the Pulse
相關(guān)PDF資料
PDF描述
XR68C681P IC UART CMOS DUAL 40PDIP
XR68C681CP IC UART CMOS DUAL 40PDIP
V24B24H150BG CONVERTER MOD DC/DC 24V 150W
XR20M1172IG28 IC UART FIFO I2C/SPI 64B 28TSSOP
XR20M1170IL28-F IC UART FIFO I2C/SPI 64B 28QFN
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XR88C681J 制造商:Exar Corporation 功能描述:
XR88C681J-F 功能描述:UART 接口集成電路 0.5V-2V UART temp -45 to 85C RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR88C681JTR-F 功能描述:UART 接口集成電路 Dual Channel UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR88C681MN-S0968 制造商:Exar Corporation 功能描述:
XR88C681N/40 制造商:EXAR 制造商全稱:EXAR 功能描述:CMOS DUAL CHANNEL UART (DUART)