DS2155G/T&R Maxim Integrated Products, DS2155G/T&R Datasheet - Page 101
DS2155G/T&R
Manufacturer Part Number
DS2155G/T&R
Description
Network Controller & Processor ICs T1/E1/J1 Single-Chip gle-Chip Transceiver
Manufacturer
Maxim Integrated Products
Datasheet
1.DS2155L.pdf
(238 pages)
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18.
The receive channel blocking registers (RCBR1/RCBR2/RCBR3/RCBR4) and the transmit channel
blocking registers (TCBR1/TCBR2/TCBR3/TCBR4) control RCHBLK and TCHBLK pins, respectively.
The RCHBLK and TCHBLK pins are user-programmable outputs that can be forced either high or low
during individual channels. These outputs can be used to block clocks to a USART or LAPD controller in
ISDN-PRI applications. When the appropriate bits are set to a 1, the RCHBLK and TCHBLK pins are
held high during the entire corresponding channel time. Channels 25 through 32 are ignored when the
DS2155 is operated in the T1 mode.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Receive Channels 1 to 8 Channel Blocking Control Bits (CH1 to CH8)
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 0 to 7/Receive Channels 9 to 16 Channel Blocking Control Bits (CH9 to CH16)
CHANNEL BLOCKING REGISTERS
0 = force the RCHBLK pin to remain low during this channel time
1 = force the RCHBLK pin high during this channel time
0 = force the RCHBLK pin to remain low during this channel time
1 = force the RCHBLK pin high during this channel time
CH16
CH8
7
7
0
0
CH15
CH7
RCBR1
Receive Channel Blocking Register 1
88h
RCBR2
Receive Channel Blocking Register 2
89h
6
0
6
0
CH14
CH6
5
0
5
0
CH13
CH5
4
0
4
0
101 of 238
CH12
CH4
3
0
3
0
CH11
CH3
2
0
2
0
CH10
CH2
1
0
1
0
CH1
CH9
0
0
0
0
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