Owner's manual

A/T8xC5121

4164G–SCR–07/06

Table 27. SCWT2 Register

SCWT2 (S:B6h, SCRS = 0)

Smart Card Character/Block Wait Time Register 2

Reset Value = 0000 0000b

Table 28. SCWT1 Register

SCWT1 (S:B5h, SCRS = 0) Smart Card Character/Block Wait Time Register 1

Reset Value = 0010 0101b

Table 29. SCWT0 Register

SCWT0 (S:B4h, SCRS = 0)

Smart Card Character/Block Wait Time Register 0

Reset Value = 1000 0000b

76543210

WT23 WT22 WT21 WT20 WT19 WT18 WT17 WT16

Bit

Number

Bit

Mnemonic Description

7-0 WT[23:16]

Wait Time Byte 2

Used together with WT[15:0] (see SCWT0 Register).

76543210

WT15 WT14 WT13 WT12 WT11 WT10 WT9 WT8

Bit

Number

Bit

Mnemonic Description

7-0 WT[15:8]

Wait Time Byte 1

Used together with WT[23:16] and WT[7:0] (see SCWT0 Register).

76543210

WT7 WT6 WT5 WT4 WT3 WT2 WT1 WT0

Bit

Number

Bit

Mnemonic Description

7-0 WT[7:0]

Wait Time Byte 0

WT[23:0] is the reload value of the Wait Time counter WTC.

The WTC is a general-purpose Timer 0. It is using the ETU clock and is

controlled by the WTEN bit (see Section “Waiting Time Counter (WT)”).

When UART bit of SCICR Register 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.