Rainbow-electronics AT89C5122 Manual de usuario descargar pdf (Pagina 86)

AT8xC5122/23

4202E–SCR–06/06

Reset Value = 0000 1100b

Reset Value = XXXX XXX0b

Reset Value = 0000 0000b

Table 53. Smart Card Transmit Guard Time Register 0 - SCGT0 (S:B4h, SCRS=1)

76543210

GT7 GT6 GT5 GT4 GT3 GT2 GT1 GT0

Bit Number Bit Mnemonic Description

7 - 0 GT[7:0]

Transmit Guard Time LSB

The minimum time between two consecutive start bits in transmit mode is GT[8:0] * ETU. This is equal to ISO IEC

Guard Time +10 (see Guard Time Counter description.

According to ISO IEC 7816,the time between 2 consecutive leading edge start bits can be set between 11 and

266 (11 to 254+12 ETUs).

Table 54. Smart Card Transmit Guard Time Register 1 - SCGT1 (S:B5h, SCRS=1)

76543210

-------GT8

Bit Number Bit Mnemonic Description

7 - 1 -

Reserved

The value read from these bits is indeterminate. Do not change these bits.

0GT8

Transmit Guard Time MSB

Used together with the Transmit Guard Time LSB in SCGT0 register (Table 53).

Table 55. Smart Card Character/Block Waiting Time Register 3

SCWT3 (S:C1h, SCRS=0)

76543210

WT31 WT30 WT29 WT28 WT27 WT26 WT25 WT24

Bit Number Bit Mnemonic Description

7 - 0 WT[31:24]

Waiting Time Byte3

Used together with WT[23:0] in registers SCWT2,SCWT1, SCWT0 (see Table 56).

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 212 213

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Rainbow-electronics AT89C5122 Manual de usuario Pagina 86