參數(shù)資料
型號: SAF82525
廠商: INFINEON TECHNOLOGIES AG
英文描述: Data Communications ICs
中文描述: 數(shù)據(jù)通信集成電路
文件頁數(shù): 91/126頁
文件大小: 730K
代理商: SAF82525
Semiconductor Group
91
SAB 82525
SAB 82526
SAF 82525
SAF 82526
k
is the timer resolution factor which is either 32.768 or 512-clock cycles dependent on
the programming of TRS bit in MODE.
TCP is the clock period of transmit data.
Timer Register (READ/WRITE)
TIMR
CNT
VALUE
(23/63)
75
40
VALUE … Sets the time period
t
1
as follows:
t
1
=
k
×
(VALUE + 1)
×
TCP
where
CNT … Interpreted differently dependent on the selected timer mode (bit TMD in MODE).
Internal timer mode (MODE.TMD = 1)
retry counter (in HDLC known as N2)
CNT indicates the number of S-commands (max. 6) which are transmitted autonomously by
the HSCX after expiration of time period
t
1
,
in case an
I
-frame is not acknowledged by the
opposite station.
If CNT is set to 7, the number of S-commands is unlimited.
External timer mode (MODE,TMD = 0)
CNT plus VALUE indicates the time period
t
2
after which a timer interrupt will be
generated. The time period
t
2
is
t
2
= 32
×
k
×
CNT
×
TCP +
t
1
If CNT is set to 7, a timer interrupt periodically generated after the expiration o
f
t
1
.
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