CC256X Datasheet, PDF (37/51 Pages) Texas Instruments – Bluetooth® Smart Ready Controller

CC256x
www.ti.com
SWRS121C – JULY 2012 – REVISED OCTOBER 2013
Table 4-1. UART Timing Characteristics (continued)
Symbol
Characteristics
t1 RTS low to RX_DATA on
t2 RTS high to RX_DATA off
Condition
Interrupt set to 1/4 FIFO
Min
Typ
Max Unit
0
2
μs
16
byte
Figure 4-2 shows the UART data frame. Table 4-2 describes the symbols used in Figure 4-2.
tb
TX
STR
D0
D1
D2
Dn
PAR STP
td_uart_swrs064
Figure 4-2. Data Frame
Table 4-2. Data Frame Key
Symbol
STR
D0...Dn
PAR
STP
Description
Start-bit
Data bits (LSB first)
Parity bit (optional)
Stop-bit
4.4.2 PCM
Figure 4-3 shows the interface timing for the PCM. Table 4-3 and Table 4-4 list the associated master and
slave parameters, respectively.
T_clk
T_w
T_w
AUD_CLK
t_is
t_ih
AUD_IN / FSYNC_IN
t_op
AUD_OUT / FSYNC_OUT
Figure 4-3. PCM Interface Timing
Symbol
T_clk
Cycle time
Parameter
T_w
High or low pulse width
t_is
AUD_IN setup time
t_ih
AUD_IN hold time
t_op
AUD_OUT propagation time
t_op
FSYNC_OUT propagation time
Table 4-3. PCM Master
Condition
40-pF load
40-pF load
Min
244.14
(4.096 MHz)
50% of T_clk min
25
0
0
0
td_aud_swrs064
Max
Unit
15625
ns
(64 kHz)
10
10
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Device Specifications
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