- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄376452 > XR-88C681 (Exar Corporation) () PDF資料下載
參數(shù)資料
| 型號： | XR-88C681 |
| 廠商： | Exar Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件頁數(shù)： | 3/8頁 |
| 文件大小： | 64K |
| 代理商： | XR-88C681 |
TAN - 011
A Comparison between Exar’s XR-88C681 and Motorola’s MC2681 DUART Devices
Table 1, Register Addressing of “Read Mode” Registers for the XR-88C681 and the
MC2681 devices
DUART Address Bits
DUART Device/Read Mode Registers
A3
A2
A1
A0
XR-88C681
0
0
0
0
Mode Registers, Channel A
(MR1A, MR2A)
0
0
0
1
Status Register, Channel A,
(SRA)
0
0
1
0
Masked Interrupt Status
Register (MISR)
0
0
1
1
Receiver Holding Register,
Channel A (RHRA)
0
1
0
0
Input Port Change Register
(IPCR)
0
1
0
1
Interrupt Status Register
(ISR)
0
1
1
0
Counter/Timer Upper Byte
Register (CTUR)
0
1
1
1
Counter/Timer Lower Byte
Register (CTLR)
1
0
0
0
Mode Registers, Channel B
(MR1B, MR2B)
1
0
0
1
Status Register, Channel B
(SRB)
1
0
1
0
RESERVED
1
0
1
1
Receiver Holding Register,
Channel B (RHRB)
1
1
0
0
Interrupt Vector Register
1
1
0
1
Input Port
1
1
1
0
Start Counter Command
1
1
1
1
Stop Counter Command
Note: Differences between these two devices are in Bold-Italics
Shaded boxes denote “Address Triggered” Commands
MC2681
Mode Registers, Channel A
(MR1A, MR2A)
Status Register, Channel A,
(SRA)
Do not access
Receiver Holding Register,
Channel A (RHRA)
Input Port Change Register
(IPCR)
Interrupt Status Register
(ISR)
Counter/Timer Upper Byte
Register (CTUR)
Counter/Timer Lower Byte
Register (CTLR)
Mode Registers, Channel B
(MR1B, MR2B)
Status Register, Channel B
(SRB)
Do Not Access
Receiver Holding Register,
Channel B (RHRB)
Do Not Access
Input Port
Start Counter Command
Stop Counter Command
Table 2 presents the DUART Address and the corresponding “Write” mode Register that
will be accessed for each of these two devices.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XR-L567 | Micropower Tone Decoder |
| XR-T3588CP | V.35 Interface Receiver/Transmitter |
| XR-T3589 | V.35 Interface Receiver/Transmitter |
| XR-T3589CN | V.35 Interface Receiver/Transmitter |
| XR-T3588-89ES | XR-T3588/89 Evaluation System |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR-88C681/24CN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART |
| XR-88C681/24N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART |
| XR-88C681/28CN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART |
| XR-88C681/28CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART |
| XR-88C681/28M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。