73S1209F Maxim, 73S1209F Datasheet - Page 92

• Manufacturer Part Number: 73S1209F
• Description: The 73S1209F is a self-contained, SoC smart card reader IC that is an ideal solution for serially connected ISO 7816 design
• Manufacturer: Maxim

This register controls the external smart card (SCLK) clock generation.
MSB
SC Clock Configuration Register (SCCLK): 0xFE0F
This register controls the internal smart card (CLK) clock generation.
External SC Clock Configuration Register (SCECLK): 0xFE10
92
SCECLK.7
SCECLK.6
SCECLK.5
SCECLK.4
SCECLK.3
SCECLK.2
SCECLK.1
SCECLK.0
SCCLK.7
SCCLK.6
SCCLK.5
SCCLK.4
SCCLK.3
SCCLK.2
SCCLK.1
SCCLK.0
MSB
–
Bit
Bit
–
ECLKFS.5
ECLKFS.4
ECLKFS.3
ECLKFS.2
ECLKFS.1
ECLKFS.0
ICLKFS.5
ICLKFS.4
ICLKFS.3
ICLKFS.2
ICLKFS.1
ICLKFS.0
Symbol
Symbol
–
–
–
–
–
–
ECLKFS.5
Internal Smart Card CLK Frequency Select – Division factor to determine
internal smart card CLK frequency. MCLK clock is divided by (register
value + 1) to clock the ETU divider, and then by 2 to generate CLK. Default
ratio is 13. The programmed value in this register is applied to the divider
after this value is written, in such a manner as to produce a glitch-free
output, regardless of the selection of active interface. A register value = 0
will default to the same effect as register value = 1.
External Smart Card CLK Frequency Select – Division factor to determine
external smart card CLK frequency. MCLK clock is divided by (register
value + 1) to clock the ETU divider, and then by 2 to generate SCLK.
Default ratio is 13. The programmed value in this register is applied to the
divider after this value is written, in such a manner as to produce a glitch-
free output, regardless of the selection of active interface. A register value
= 0 will default to the same effect as register value = 1.
ICLKFS.5 ICLKFS.4 ICLKFS.3 ICLKFS.2 ICLKFS.1 ICLKFS.0
Table 88: The SCECLK Register
Table 87: The SCCLK Register
ECLKFS.4
ECLKFS.
3
0x0C
Function
Function
ECLKFS.2 ECLKFS.1 ECLKFS.0
0x0C
LSB
Rev. 1.2
LSB