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参数资料
| 型号： | MT8952BPR |
| 厂商： | ZARLINK SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 1 CHANNEL(S), 2.5M bps, SERIAL COMM CONTROLLER, PQCC28 |
| 封装： | PLASTIC, MS-018AB, LCC-28 |
| 文件页数： | 5/32页 |
| 文件大小： | 602K |
| 代理商： | MT8952BPR |
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MT8952B
Data Sheet
13
Zarlink Semiconductor Inc.
Rx15/19 FULL - Receive FIFO 15/19 full: This bit when HIGH, confirms that the receive FIFO has 15 bytes in it
and it can receive four more bytes.
Rx OFLW - Receive FIFO overflow: This bit when set HIGH, indicates that the receive FIFO is full and a ‘write’
occurred indicating an overflow. The byte causing this and all the subsequent bytes written while the FIFO is in this
state are lost. The receiver begins to search for a new start flag.
Watchdog Timer Register (Write)
The Watchdog Timer Register operates in conjunction with the Watchdog Timer and the WD output. Writing the
code of XXX0 1010 in the register resets the WD timer. If the register is not re-written within 210 cycles of F0i after
resetting the timer, the WD output goes LOW. This register serves the sole purpose of resetting the timer and hence
relevant only if it is written with the above data.
Interrupt Enable Register (Read/Write)
This register enables/disables the interrupts as specified in the Interrupt Flag Register (IFR). Setting HIGH the
appropriate bits in this register (IER) enables the associated interrupt source. However, the masked bits in the IFR
are still valid but they do not cause the IRQ output to go LOW. The description of the bits enabling the various
interrupts is identical to those of the Interrupt Flag Register.
General Status Register (Read)
This register (Figure 12) contains the general status information on the Protocol Controller.
Figure 12 - General Status Register
Rx OFLW - Receive FIFO overflow: This bit, if set HIGH, indicates that the receive FIFO has overflowed. The byte
causing this and all the subsequent bytes written while the FIFO is in this state are lost. Note that this bit is the
same as the Rx OFLW bit in Interrupt Flag Register (IFR) and can only be cleared by reading the IFR.
Tx URUN - Transmit FIFO Underrun: When HIGH, this bit indicates that the transmit FIFO has underrun. Under
this condition the packet being transmitted is aborted. This bit is the same as the Tx URUN bit in the Interrupt Flag
Register (IFR) and can only be cleared when the IFR is read.
GA - Go Ahead: This bit is set HIGH if a ‘go ahead’ is received on the incoming data stream and is cleared when
the Interrupt Flag Register is read. This bit is the same as the GA bit in the IFR.
ABRT - Abort: The reception of contiguous seven ONEs on incoming data, sets this bit HIGH and reading the
General Status Register, clears it.
IRQ - Interrupt Request: This bit refers to the status of the interrupt request output from the Protocol Controller. If
HIGH, it indicates that the IRQ (pin 6) output is LOW and vice versa.
IDLE - Idle Channel: This bit, if set HIGH, identifies that the receiver is detecting an idle channel at its input
(minimum 15 ONEs).
C-Channel Status Register (Read)
Figure 13 - C-Channel Status Register
D7
D6
D5
D4
D3
D2
D1
D0
Rx
OFLW
Tx
URUN
GA
ABRT
IRQ
IDLE
LOW
HIGH
D7
D6
D5
D4
D3
D2
D1
D0
CR7
CR6
CR5
CR4
CR3
CR2
CR1
CR0
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相关代理商/技术参数 |
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| MT8952BPR1 | 制造商:Microsemi Corporation 功能描述:PB FREE HDLC CONTROLLER, PLCC - Tape and Reel 制造商:Zarlink Semiconductor Inc 功能描述:PB FREE HDLC CONTROLLER, PLCC - Tape and Reel |
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