73s1210f68im Maxim Integrated Products, Inc., 73s1210f68im Datasheet - Page 99
73s1210f68im
Manufacturer Part Number
73s1210f68im
Description
Self-contained Smart Card Reader With Pinpad And Power Management
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.73S1210F68IM.pdf
(126 pages)
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DS_1210F_001
Block Guard Time Register (BGT): 0xFE16 0x10
This register contains the Extra Guard Time Value (EGT) most-significant bit. The Extra Guard Time
indicates the minimum time between the leading edges of the start bit of consecutive characters. The
delay is depends on the T=0/T=1 mode. Used in transmit mode. This register also contains the Block
Guard Time (BGT) value. Block Guard Time is the minimum time between the leading edge of the start
bit of the last character received and the leading edge of the start bit of the first character transmitted.
This should not be set less than the character length. The transmission of the first character will be held
off until BGT has elapsed regardless of the TX data and TX/RX control bit timing.
Extra Guard Time Register (EGT): 0xFE17 0x0C
This register contains the Extra Guard Time Value (EGT) least-significant byte. The Extra Guard Time
indicates the minimum time between the leading edges of the start bit of consecutive characters. The
delay depends on the T=0/T=1 mode. Used in transmit mode.
Rev. 1.4
MSB
MSB
BGT.7
BGT.6
BGT.5
BGT.4
BGT.3
BGT.2
BGT.1
BGT.0
EGT.8
EGT.7
Bit
EGT.7
EGT.6
EGT.5
EGT.4
EGT.3
EGT.2
EGT.1
EGT.0
Bit
Symbol
EGT.6
EGT.8
BGT.4
BGT.3
BGT.2
BGT.1
BGT.0
–
–
–
Time in ETUs between start bits of consecutive characters. In T=0
mode, the minimum is 1. In T=0, the leading edge of the next start bit
may be delayed if there is a break detected from the smart card.
Default value is 12. In T=0 mode, regardless of the value loaded, the
minimum value is 12, and for T=1 mode, the minimum value is 11.
EGT.5
Most-significant bit for 9-bit EGT timer. See the
Time in ETUs between the start bit of the last received character to
start bit of the first character transmitted to the smart card. Default
value is 22.
–
Table 95: The BGT Register
Table 96: The EGT Register
BGT.4
EGT.4
BGT.3
EGT.3
Function
Function
BGT.1
EGT.1
BGT.2
EGT.2
EGT
73S1210F Data Sheet
register.
BGT.0
EGT.0
LSB
LSB
99
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