73S1217F-68MR/F/PE Maxim Integrated, 73S1217F-68MR/F/PE Datasheet - Page 106
73S1217F-68MR/F/PE
Manufacturer Part Number
73S1217F-68MR/F/PE
Description
8-bit Microcontrollers - MCU
Manufacturer
Maxim Integrated
Datasheet
1.73S1217F-68MRFPE.pdf
(140 pages)
Specifications of 73S1217F-68MR/F/PE
Rohs
yes
Core
80515
Data Bus Width
8 bit
Part # Aliases
90-W1217+TF5
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FD Control Register (FDReg): 0xFE13
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.
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
FDReg.7
FDReg.6
FDReg.5
FDReg.4
FDReg.3
FDReg.2
FDReg.1
FDReg.0
Note: values marked with ⊕ are not included in the ISO definition and arbitrary values have been
assigned.
FI (code)
Fi (ratio)
FCLK max
FI(code)
Fi(ratio)
FCLK max
DI(code)
Di(ratio)
DI(code)
Di(ratio)
Bit
MSB
FVAL.3
Symbol
DVAL.3
DVAL.2
DVAL.1
DVAL.0
FVAL.3
FVAL.2
FVAL.1
FVAL.0
0000
372
4
1000
512⊕
5⊕
0000
1⊕
1000
12
FVAL.2
Table 98: Divider Ratios Provided by the ETU Counter
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.
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).
0001
372
5
1001
512
5
0001
1
1001
20
FVAL.1
Table 97: The FDReg Register
0010
558
6
1010
768
7.5
0010
2
1010
16⊕
FVAL.0
0x11
0011
744
8
1011
1024
10
0011
4
1011
16⊕
DVAL.3
0100
1116
12
1100
1536
15
0100
8
1100
16⊕
Function
DVAL.2
0101
1488
16
1101
2048
20
0101
16
1101
16⊕
DVAL.1
0110
1860
20
1110
2048⊕
20⊕
0110
32
1110
16⊕
DVAL.0
LSB
0111
1860⊕
20⊕
1111
2048⊕
20⊕
0111
32⊕
1111
16⊕
Rev. 1.2
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