TL16C752B
3.3-V DUAL UART WITH 64-BYTE FIFO
SLLS405A – DECEMBER 1999 – REVISED AUGUST 2000
programmable baud generator (continued)
V
CC
V
CC
Driver
XTAL1
XTAL1
Crystal
External
Clock
C1
R
P
Optional
Driver
RX2
Optional
Clock
Output
Oscillator Clock
to Baud Generator
Logic
Oscillator Clock
to Baud Generator
Logic
XTAL2
XTAL2
C2
TYPICAL CRYSTAL OSCILLATOR NETWORK
CRYSTAL
3.072 MHz
1.8432 MHz
R
RX2
C1
C2
P
1 MΩ
1 MΩ
1.5 kΩ
1.5 kΩ
10–30 pF
10–30 pF
40–60 pF
40–60 pF
†
Figure 10. Typical Crystal Clock Circuits
†
For crystal with fundamental frequency from 1 MHz to 24 MHz
NOTE: For input clock frequency higher than 24 MHz, the crystal is not allowed and the oscillator must be used, since the TL16C752B internal
oscillator cell can only support the crystal frequency up to 24 MHz.
15
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
