Datasheet
DS2155
214 of 238
Figure 35-13. Receive-Side Boundary Timing, RSYSCLK = 1.544MHz (Elastic
Store Enabled)
Note 1: Data from the E1 channels 1, 5, 9, 13, 17, 21, 25, and 29 is dropped (channel 2 from the E1 link is mapped to channel 1 of the T1 link,
etc.) and the F-bit position is added (forced to on 1).
Note 2: RSYNC in the output mode (IOCR1.4 = 0).
Note 3: RSYNC in the input mode (IOCR1.4 = 1).
Note 4: RCHBLK is programmed to block channel 24.
Figure 35-14. Receive-Side Boundary Timing, RSYSCLK = 2.048MHz (Elastic
Store Enabled)
Note 1: RSYNC is in the output mode (IOCR1.4 = 0).
Note 2: RSYNC is in the input mode (IOCR1.4 = 1).
Note 3: RCHBLK is programmed to block channel 1.
Note 4: RSIG normally contains the CAS multiframe alignment nibble (0000) in channel 1.
RSER
CHANNEL 23/31
CHANNEL 24/32 CHANNEL 1/2
RCHCLK
RCHBLK
RSYSCLK
RSYNC
2
3
RSYNC
1
RMSYNC
LSB
F
MSB
MSB
LSB
4
RSER
CHANNEL 1
RCHCLK
RCHBLK
RSYSCLK
RSYNC
CHANNEL 31 CHANNEL 32
1
3
RSYNC
2
RMSYNC
RSIG
CHANNEL 31
CHANNEL 32
C
D
AB
CHANNEL 1
LSB MSB
LSB
MSB
C
D
BA
Note 4