參數(shù)資料
型號: CLRC632
廠商: NXP Semiconductors N.V.
英文描述: Multiple Protocol Contactless Reader IC
中文描述: 多協(xié)議非接觸式讀卡器IC
文件頁數(shù): 22/163頁
文件大?。?/td> 948K
代理商: CLRC632
Philips Semiconductors
Product Specification Rev. 3.0; May 2003
Multiple Protocol Contactless Reader IC
CL RC632
22
Confidential
5.1.1
REGISTER BIT BEHAVIOUR
Bits and flags for different registers behave differently, depending on their functions. In principle bits with
same behaviour are grouped in common registers.
Abbreviation
Behaviour
Description
r/w
read and
write
These bits can be written and read by the μ-Processor. Since they are used
only for control means, there content is not influenced by internal state
machines, e.g. the
TimerReload-Register
may be written and read by the μ-
Processor. It will also be read by internal state machines, but never changed by
them.
dy
dynamic
These bits can be written and read by the μ-Processor. Nevertheless, they may
also be written automatically by internal state machines, e.g. the
Command-
Register
changes its value automatically after the execution of the actual
command.
r
read only
These registers hold flags, which value is determined by internal states only,
e.g. the
ErrorFlag-Register
can not be written from external but shows internal
states.
w
write only
These registers are used for control means only. They may be written by the μ-
Processor but can not be read. Reading these registers returns an undefined
value, e.g. the
TestAnaSelect-Register
is used to determine the signal on pin
AUX, but it is not possible to read its content.
Table 5-2: Behaviour of Register Bits and its Designation
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