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參數(shù)資料
| 型號： | P89LPC931FDH |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-bit microcontrollers with two-clock 80C51 core 4 kB-8 kB 3 V Flash with 256-byte data RAM |
| 封裝： | P89LPC930FDH<SOT361-1 (TSSOP28)|<<http://www.nxp.com/packages/SOT361-1.html<1<week 47, 2004,;P89LPC931FDH<SOT361-1 (TSSOP28)|<<http://www.nxp.com/packages/SOT361-1.html&l |
| 文件頁數(shù)： | 21/55頁 |
| 文件大?。?/td> | 267K |
| 代理商： | P89LPC931FDH |
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Philips Semiconductors
P89LPC930/931
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 05 — 15 December 2004
28 of 55
9397 750 14472
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
8.17.2
Mode 1
10 bits are transmitted (through TxD) or received (through RxD): a start bit (logic ‘0’),
8 data bits (LSB rst), and a stop bit (logic ‘1’). When data is received, the stop bit is
stored in RB8 in Special Function Register SCON. The baud rate is variable and is
determined by the Timer 1 overow rate or the Baud Rate Generator (described in
8.17.3
Mode 2
11 bits are transmitted (through TxD) or received (through RxD): start bit (logic ‘0’),
8 data bits (LSB rst), a programmable 9th data bit, and a stop bit (logic ‘1’). When
data is transmitted, the 9th data bit (TB8 in SCON) can be assigned the value of ‘0’ or
‘1’. Or, for example, the parity bit (P, in the PSW) could be moved into TB8. When
data is received, the 9th data bit goes into RB8 in Special Function Register SCON,
while the stop bit is not saved. The baud rate is programmable to either 1
16 or 132 of
the CPU clock frequency, as determined by the SMOD1 bit in PCON.
8.17.4
Mode 3
11 bits are transmitted (through TxD) or received (through RxD): a start bit (logic ‘0’),
8 data bits (LSB rst), a programmable 9th data bit, and a stop bit (logic ‘1’). In fact,
Mode 3 is the same as Mode 2 in all respects except baud rate. The baud rate in
Mode 3 is variable and is determined by the Timer 1 overow rate or the Baud Rate
Generator (described in section Section 8.17.5 “Baud rate generator and selection”).
8.17.5
Baud rate generator and selection
The P89LPC930/931 enhanced UART has an independent Baud Rate Generator.
The baud rate is determined by a baud-rate preprogrammed into the BRGR1 and
BRGR0 SFRs which together form a 16-bit baud rate divisor value that works in a
similar manner as Timer 1. If the baud rate generator is used, Timer 1 can be used for
other timing functions.
The UART can use either Timer 1 or the baud rate generator output (see Figure 6).
Note that Timer T1 is further divided by 2 if the SMOD1 bit (PCON.7) is cleared. The
independent Baud Rate Generator uses OSCCLK.
8.17.6
Framing error
Framing error is reported in the status register (SSTAT). In addition, if SMOD0
(PCON.6) is ‘1’, framing errors can be made available in SCON.7 respectively. If
SMOD0 is ‘0’, SCON.7 is SM0. It is recommended that SM0 and SM1 (SCON.7:6)
are set up when SMOD0 is ‘0’.
Fig 6.
Baud rate sources for UART (Modes 1, 3).
Baud Rate Modes 1 and 3
SBRGS = 1
SBRGS = 0
SMOD1 = 0
SMOD1 = 1
2
Timer 1 Overflow
(PCLK-based)
Baud Rate Generator
(CCLK-based)
002aaa419
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P89LPC931FDH,112 | 功能描述:8位微控制器 -MCU 80C51 8K FL 256B RAM 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(shí)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 |
| P89LPC931FDH,129 | 功能描述:8位微控制器 -MCU 8K FL/256B RAM/I2C/SPI/TSSOP28 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(shí)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 |
| P89LPC931FDH.129 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 8K FLASH SMD 89LC931 |
| P89LPC931FDH.129 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 8K FLASH SMD 89LC931 |
| P89LPC932 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit microcontroller with two-clock core 8 KB 3 V low-power Flash with 512-byte data EEPROM |
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