參數(shù)資料
型號(hào)： HPC46400EV2
廠商： National Semiconductor Corporation
英文描述： High-Performance Communications MicroController
中文描述： 高性能通信微控制器
文件頁(yè)數(shù)： 8/30頁(yè)
文件大?。?/td> 362K
代理商： HPC46400EV2
MICROWIREPLUS Operation
The HPC46400E can enter the MICROWIREPLUS mode
as the master or a slave A control bit in the IRCD register
determines whether the HPC46400E is the master or slave
The shift clock is generated when the HPC46400E is config-
ured as a master An externally generated shift clock on the
SK pin is used when the HPC46400E is configured as a
slave When the HPC46400E is a master the DIVBY regis-
ter programs the frequency of the SK clock The DIVBY
register allows the SK clock frequency to be programmed in
14 selectable steps from 122 Hz to 1 MHz with CKI at
16 MHz
The contents of the SIO register may be accessed through
any of the memory access instructions Data waiting to be
transmitted in the SIO register is shifted out on the falling
edge of the SK clock Serial data on the SI pin is latched in
on the rising edge of the SK clock
HPC46400E UART
The HPC46400E contains a software programmable UART
The UART (see
Figure 16 ) consists of a transmit shift regis-
ter a receiver shift register and five addressable registers
as follows a transmit buffer register (TBUF) a receiver buff-
er register (RBUF) a UART control and status register
(ENU) a UART receive control and status register (ENUR)
and a UART interrupt and clock source register (ENUI) The
ENU register contains flags for transmit and receive func-
tions this register also determines the length of the data
frame (7 8 or 9 bits) and the value of the ninth bit in trans-
mission The ENUR register flags framing parity and data
overrun errors while the UART is receiving Other functions
of the ENUR register include saving the ninth bit received in
the data frame reporting receiving and transmitting status
and enabling or disabling the UART’s Wake-up Mode of op-
eration The determination of an internal or external clock
source is done by the ENUI register as well as selecting the
number of stop bits (
1 1
2) selecting between the
synchronous or asynchronous mode and enabling or dis-
abling transmit and receive interrupts
The clock inputs to the Transmitter and Receiver sections
of the UART can be individually selected to come from ei-
ther an off-chip source on the CKX pin or one of the three
on-chip sources Presently two of the on-chip sources the
Divide-By (DIVBY) Register and the Precision UART Timer
(PUT) are primarily for reasons of upward compatibility from
earlier HPC family members The most flexible and accurate
on-chip clocking is provided by the third source the Baud
Rate Generator (BRG)
The Baud Rate Generator is controlled by the register pair
PSR and BAUD shown below
The Prescaler factor is selected by the upper 5 bits of the
PSR register (the PRESCALE field) in units of the CK2
clock from 1 to 16 in
step increments The lower 3 bits of
the PSR register in conjunction with the 8 bits of the baud
register form the 11-bit BAUDRATE field which defines a
baud rate divisor ranging from 1 to 2048 in units of the
prescaled clock selected by the PRESCALE field
In Asynchronous Mode the resulting baud rate is
of the
clocking rate selected through the BRG circuit The maxi-
mum baud rate generated using the BRG is 625 kbaud
In the Synchronous Mode data is transmitted on the rising
edge and received on the falling edge of the external clock
Although the data is transmitted and received synchronous-
ly it is still contained within an asynchronous frame ie a
start bit parity bit (if selected) and stop bit(s) are still pres-
ent
TLDD10422 – 25
FIGURE 16 UART Block Diagram
TLDD10422 – 26
UART Baud Rate Generator (BRG) Registers PSR and BAUD
16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HPC46400EV20 功能描述:16位微控制器 - MCU RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
HPC46400EV20/NOPB 功能描述:16位微控制器 - MCU RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT
HPC46400EVHG2 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:High-Performance Communications MicroController
HPC46400EVHG20 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:High-Performance Communications MicroController
HPC46400L20 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:16-Bit Microcontroller
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