参数资料
型号: PCM9211PTR
厂商: TEXAS INSTRUMENTS INC
元件分类: 网络接口
英文描述: DATACOM, TOKEN RING TRANSCEIVER, PQFP48
封装: GREEN, PLASTIC, LQFP-48
文件页数: 49/121页
文件大小: 1219K
代理商: PCM9211PTR
InterruptSource
MaskBit
ToINTx
DIR
Register2Ah/2Bh
Register2Ch/2Dh
Register20h
Register28h
Register20h
Register2Eh
Register6Bh
INT0P
INT1P
ERRCON
NPCMSEL
NPCMP
NPCMHZ
ERRSEL
ERRHZ
MOPSRC
INT0/1
Mask
INT0/1
Register
Emphasis
DTS-CD/LD
ChannelStatus
BurstPreamble
f Calculator
Complete
S
‘1’
NPCM/INT1
ExternalPin
ERR/INT0
ExternalPin
Hi-Z
www.ti.com
SBAS495 – JUNE 2010
Upon receipt of an interrupt source (such as fS Calculator Complete), INT0 or INT1 performs a bitwise evaluation
of AND (&) with an inverted mask [Register 2Ah (INT0) and Register 2Bh (INT1)], then perform an eight-way OR
of the data. If the output is '1', then INTx is set to '1', which can be used to trigger an interrupt in the host DSP.
The host can then poll the INTx register to determine the interrupt source. Figure 27 shows the logic that the
device uses to mask the DIR interrupts from the INTx register.
Figure 27. DIR Interrupt Mask Logic
Once the register is read, each of the bits in the register (INT0 and INT1) are cleared. If the signal is routed to
ERR/INT0 or NPCM/INT1, the output pin is also cleared.
By default, the mask registers are set to mask all inputs; that is, all inputs are rejected, in which case no interrupt
can be seen on the output until the mask is changed.
A block diagram for the error output and interrupt output is shown in Figure 28.
Figure 28. Error Output and Interrupt Output Block Diagram
Copyright 2010, Texas Instruments Incorporated
33
Product Folder Link(s): PCM9211
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