參數(shù)資料
型號: IT8228E
英文描述: LPC Media I/F Specification v0.2 | PC Product Line
中文描述: LPC媒體我/女規(guī)格v0.2 |個人電腦產(chǎn)品線
文件頁數(shù): 83/93頁
文件大?。?/td> 479K
代理商: IT8228E
8.9.2
www.ite.com.tw
IT8228E V0.2
73
Functional Description
Waveform Relationship
SCRCLK
SCRIO
9600 Baud
Rate Output
1 etu=372 SCRCLK
(24 MHz/13)/12/16
(24 MHz/13)/12
16 BAUD clocks
1/9600 seconds
Figure 8-5. 9600 Baud Rate Example
8.9.3
The SCRCLK is generated as the selection of SCR_CLKSEL1-0, which is determined in the SCR Special
Configuration register 2 (LDN4_F1h).
Table 8-7. SCRCLK Selections
SCR_CLKSEL1-0
00
Stop
Clock Divider
Selections
01
3.5 MHz
10
7.1 MHz
96 MHz / SCR DIV96M
Note
11
8.9.4
Waveform Example of Activation/Deactivation Sequence
SCRPRES#
CARDVCC
SOUT
SCRCLK
SCRPFET#
SCRRST
DTR#
RTS#
Flow_CLK
SCR_power-on
Interrupt
Enable :
1. SCRRST = ~RTS#
2. SCRCLK if SCR_CLKSEL1-0 is not 00b.
SCRIO
Enable SCRIO
ATR, PTS, Xfer
PTS, Tx
Activation Sequence
ATR from ICC with Internal Reset
Deactivation Sequence
Interrupt if IC card
emergency removed
VCC Charge time
is 13/53/212
μ
s
Figure 8-6. Waveform Example of IFD
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