Zilog Z16C35 - Manual (Page 134)

ISCC
User Manual
UM011002-0808
128
This bit can be polled in SDLC mode to determine when the closing flag has been sent.
Bit 1 is the On Loop status
This bit is set to “1” while the ISCC is actually on loop in SDLC Loop mode. This bit is
set to “1” in the X21 mode (Loop mode selected while in monosync) when the transmitter
goes active. This bit is “0” at all other times. This bit can also be polled in SDLC mode to
determine when the closing flag has been sent.
5.5.7 Read Register 12
RR12 returns the value stored in WR12, the lower byte of the time constant for the baud
rate generator. Figure 5-23 shows the bit positions for RR12.
Figure 5–52. Read Register 12
5.5.8 Read Register 13
RR13 returns the value stored in WR13, the upper byte of the time constant for the baud
rate generator. Figure 5-24 shows the bit positions for RR13.
Read Register 12
D6 D7 D5 D4 D3 D2 D1 D0
TC0
TC1
TC2
TC3
TC4
TC5
TC6
TC7
Lower
Byte of
Time
Constant
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