參數資料
型號: PIC16F1827-I/ML
廠商: Microchip Technology
文件頁數: 73/109頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 4K 28-QFN
產品培訓模塊: XLP Deep Sleep Mode
8-bit PIC® Microcontroller Portfolio
特色產品: Extreme Low Power (XLP) Microcontrollers
標準包裝: 61
系列: PIC® XLP™ mTouch™ 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 32MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數: 16
程序存儲器容量: 7KB(4K x 14)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 384 x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 5.5 V
數據轉換器: A/D 12x10b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-VQFN 裸露焊盤
包裝: 托盤
產品目錄頁面: 655 (CN2011-ZH PDF)
SC16C850
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 2 — 11 November 2010
26 of 55
NXP Semiconductors
SC16C850
2.5 to 3.3 V UART with 128-byte FIFOs and IrDA encoder/decoder
[1]
When RXINTLVL, TXINTLVL, FLWCNTL or FLWCNTH contains any value other than 0x00, receive and
transmit trigger levels are set by RXINTLVL, TXINTLVL registers (see Section 6.4 “FIFO operation”).
7.4 Interrupt Status Register (ISR)
The SC16C850 provides six levels of prioritized interrupts to minimize external software
interaction. The Interrupt Status Register (ISR) provides the user with six interrupt status
bits. Performing a read cycle on the ISR will provide the user with the highest pending
interrupt level to be serviced. No other interrupts are acknowledged until the pending
interrupt is serviced. A lower level interrupt may be seen after servicing the higher level
interrupt and re-reading the interrupt status bits. Table 13 “Interrupt source” shows the
data values (bits 5:0) for the six prioritized interrupt levels and the interrupt sources
associated with each of these interrupt levels.
Table 12.
TX FIFO trigger levels
FCR[5]
FCR[4]
TX FIFO trigger level (bytes) in 32-byte FIFO mode[1]
00
16
01
8
10
24
11
30
Table 13.
Interrupt source
Priority
level
ISR[5]
ISR[4]
ISR[3]
ISR[2]
ISR[1]
ISR[0]
Source of the interrupt
1
0
00110LSR (Receiver Line Status
Register)
2
0
00100RXRDY (Received Data Ready)
2
0
01100RXRDY (Receive Data time-out)
3
0
00010TXRDY (Transmitter Holding
Register Empty)
4
0
00000MSR (Modem Status Register)
5
0
10000RXRDY (Received Xoff signal)/
Special character
6
1
00000CTS, RTS change of state
Table 14.
Interrupt Status Register bits description
Bit
Symbol
Description
7:6
ISR[7:6]
FIFOs enabled. These bits are set to a logic 0 when the FIFOs are not being
used in the non-FIFO mode. They are set to a logic 1 when the FIFOs are
enabled in the SC16C850 mode.
logic 0 or cleared = default condition
5:4
ISR[5:4]
INT priority bits 4:3. These bits are enabled when EFR[4] is set to a logic 1.
ISR[4] indicates that matching Xoff character(s) have been detected. ISR[5]
indicates that CTS, RTS have been generated. Note that once set to a
logic 1, the ISR[4] bit will stay a logic 1 until Xon character(s) are received.
logic 0 or cleared = default condition
3:1
ISR[3:1]
INT priority bits 2:0. These bits indicate the source for a pending interrupt at
interrupt priority levels 1, 2, and 3 (see Table 13).
logic 0 or cleared = default condition
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