Rainbow Electronics AT89C5122 - Manual (Page 87)

87
AT8xC5122/23
4202E–SCR–06/06
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)
7 6 5 4 3 2 1 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)
7 6 5 4 3 2 1 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)
7 6 5 4 3 2 1 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 79 and Section “Waiting Time (WT) Counter”, page 69).
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.