ds26519 Maxim Integrated Products, Inc., ds26519 Datasheet - Page 24

• Manufacturer Part Number: ds26519
• Description: Ds26519 16-port T1/e1/j1 Transceiver
• Manufacturer: Maxim Integrated Products, Inc.

TCHBLK10/
TCHBLK11/
TCHBLK12/
TCHBLK13/
TCHBLK14/
TCHBLK15/
TCHBLK16/
TCHCLK10
TCHCLK11
TCHCLK12
TCHCLK13
TCHCLK14
TCHCLK15
TCHCLK16
TCHBLK1/
TCHBLK2/
TCHBLK3/
TCHBLK4/
TCHBLK5/
TCHBLK6/
TCHBLK7/
TCHBLK8/
TCHBLK9/
TCHCLK1
TCHCLK2
TCHCLK3
TCHCLK4
TCHCLK5
TCHCLK6
TCHCLK7
TCHCLK8
TCHCLK9
NAME
W10
W22
A15
A17
E14
H12
N20
Y22
PIN
F16
N9
D1
G2
V8
V9
Y5
K6
Output
TYPE
Transmit Channel Block/Transmit Channel Block Clock. A dual function pin.
TCHBLK[1:16]. TCHBLKn is a user-programmable output that can be forced
high or low during any of the channels. It is synchronous with TCLKn when the
transmit-side elastic store is disabled. It is synchronous with TSYSCLKn when
the transmit-side elastic store is enabled. It is useful for blocking clocks to a serial
UART or LAPD controller in applications where not all channels are used such as
Fractional T1, Fractional E1, 384kbps (H0), 768kbps, or ISDN-PRI. Also useful
for locating individual channels in drop-and-insert applications, for external per-
channel loopback, and for per-channel conditioning.
TCHCLK[1:16]. TCHCLKn is a dual function pin that can output either a gapped
clock or a channel clock. In gapped clock mode, TCHCLKn is a N x 64kHz
fractional clock, which is software programmable for 0 to 24 channels and the
F-bit (T1) or 0 to 32 channels (E1). In channel clock mode, TCHCLKn is a
192kHz (T1) or 256kHz (E1) clock that pulses high during the LSB of each
channel. It is useful for parallel-to-serial conversion of channel data. In either
mode, TCHCLKn is synchronous with TCLKn when the receive-side elastic store
is disabled or it is synchronous with TSYSCLKn when the receive-side elastic
store is enabled. The mode of TCHCLK is determined by the TGCLKEN bit in the
TESCR register.
24 of 310
FUNCTION
DS26519 16-Port T1/E1/J1 Transceiver