參數(shù)資料
型號: 73S1217F-68MR/F/PE
廠商: Maxim Integrated Products
文件頁數(shù): 9/140頁
文件大?。?/td> 0K
描述: IC SOC SMART CARD READER 68QFN
標(biāo)準(zhǔn)包裝: 2,500
系列: *
73S1217F Data Sheet
DS_1217F_002
FD Control Register (FDReg): 0xFE13
0x11
Table 97: The FDReg Register
MSB
LSB
FVAL.3
FVAL.2
FVAL.1
FVAL.0
DVAL.3
DVAL.2
DVAL.1
DVAL.0
Bit
Symbol
Function
FDReg.7
FVAL.3
Refer to Table 99. This value is converted per the table to set the divide
ratio used to generate the baud rate (ETU). Default, also used for ATR, is
0001 (Fi = 372). This value is used by the selected interface.
FDReg.6
FVAL.2
FDReg.5
FVAL.1
FDReg.4
FVAL.0
FDReg.3
DVAL.3
Refer to Table 99. This value is used to set the divide ratio used to generate
the smart card CLK. Default, also used for ATR, is 0001 (Di = 1).
FDReg.2
DVAL.2
FDReg.1
DVAL.1
FDReg.0
DVAL.0
This register uses the transmission factors F and D to set the ETU (baud) rate. The values in this register
are mapped to the ISO 7816 conversion factors as described below. The CLK signal for each interface is
created by dividing a high-frequency, intermediate signal (MSCLK) by 2. The ETU baud rate is created
by dividing MSCLK by 2 times the Fi/Di ratio specified by the codes below. For example, if FI = 0001 and
DI = 0001, the ratio of Fi/Di is 372/1. Thus, the ETU divider is configured to divide by 2 * 372 = 744. The
maximum supported F/D ratio is 4096.
Table 98: Divider Ratios Provided by the ETU Counter
FI (code)
0000
0001
0010
0011
0100
0101
0110
0111
Fi (ratio)
372
558
744
1116
1488
1860
FCLK max
4
5
6
8
12
16
20
FI(code)
1000
1001
1010
1011
1100
1101
1110
1111
Fi(ratio)
512
512
768
1024
1536
2048
2048
FCLK max
5
5
7.5
10
15
20
20
DI(code)
0000
0001
0010
0011
0100
0101
0110
0111
Di(ratio)
1
1
2
4
8
16
32
DI(code)
1000
1001
1010
1011
1100
1101
1110
1111
Di(ratio)
12
20
16
16
16
16
16
16
Note: values marked with
⊕ are not included in the ISO definition and arbitrary values have been
assigned.
The values given below are used by the ETU divider to create the ETU clock. The entries that are not
shaded will result in precise CLK/ETU per ISO requirements. Shaded areas are not precise but are
within 1% of the target value.
106
Rev. 1.2
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