AT89C5122D-RDRUM datasheet(85/208 Pages) ATMEL

85 / 208 page

AT83R5122, AT8xC5122/23

4202F–SCR–07/2008

Reset Value = 0000 0000b

Reset Value = 0010 0101b

Reset Value = 1000 0000b

Table 56.

Smart Card Character/Block Waiting Time Register 2

SCWT2 (S:B6h, SCRS=0)

WT23

WT22

WT21

WT20

WT19

WT18

WT17

WT16

Bit Number

Bit Mnemonic

Description

7 - 0

WT[23:16]

Waiting Time Byte2

Used together with WT[31:24] and WT[15:0] in registers SCWT3,SCWT1, SCWT0 (see Table 58).

Table 57.

Smart Card Character/Block Waiting Time Register 1

SCWT1 (S:B5h, SCRS=0)

WT15

WT14

WT13

WT12

WT11

WT10

WT9

WT8

Bit Number

Bit Mnemonic

Description

7 - 0

WT[15:8]

Waiting Time Byte 1

Used together with WT[31:16] and WT[7:0] in registers SCWT3,SCWT2, SCWT0 (see Table 55).

Table 58.

Smart Card Character/Block Waiting Time Register 0

SCWT0 (S:B4h, SCRS=0)

WT7

WT6

WT5

WT4

WT3

WT2

WT1

WT0

Bit Number

Bit Mnemonic

Description

7 - 0

WT[7:0]

Waiting Time Byte 0

WT[31:0] is the reload value of the Waiting Time Counter (WTC).

The WTC is a general-purpose timer. It is using the ETU clock and is controlled by the WTEN bit (see Table 44 on

page 77 and Section “Waiting Time (WT) Counter”, page 67).

When UART bit of Registers is set, the WTC is automatically reloaded at each start bit of the UART. It is used to

check the maximum time between to consecutive start bits.

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