參數(shù)資料
型號: PSB7110
廠商: SIEMENS AG
英文描述: Enhanced ISDN Data Access Controller ISAR
中文描述: 增強綜合業(yè)務數(shù)字網(wǎng)的數(shù)據(jù)接入控制器專家組
文件頁數(shù): 53/164頁
文件大小: 1173K
代理商: PSB7110
_________________________________________________PSB 7110
Siemens Aktiengesellschaft
Page 53
NMR ... Number of messages in the receive buffer
NBTL ... Number of free bytes in the transmit buffer - LSB
NBTM ... Number of free bytes in the transmit buffer - MSB
NMT ... Number of messages in the transmit buffer
The control register contains additional information about all buffers that currently have buffer space
available for a new message. The information is similar as provided in the general status event
message which is a kind of "Indication for Buffer available" (see 3.3.3.2). However, here the current
status of all buffers is indicated regardless whether there is a state transition in the individual buffer.
Detailed information about free locations in receive and transmit buffers and about the number of
messages currently stored in the buffers are available from the mailbox. These parameters only refer
to the buffer which is associated to the selected data path in IIS register.
Comment:
As the HIS register and the control word are internally also written to the buffers, a message of length
n will always require (n+3) buffer locations.
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