CC256X_13 Datasheet, PDF (36/51 Pages) Texas Instruments – Bluetooth and Dual-Mode Controller

CC256x
SWRS121C – JULY 2012 – REVISED OCTOBER 2013
4.3.4 BLE Modulation
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Characteristics
Condition
Sym Min Typ Max
Modulation
characteristics
Δf1avg
Mod data = 4 1s, 4
Δf1 240 250 260
0s:
avg
1111000011110000...
Δf2max ≥ limit for at
least 99.9% of all
Δf2max
Mod data =
1010101...
Δf2 185 210
max
Δf2avg, Δf1avg
0.85 0.9
Absolute carrier
frequency drift
–25
25
Drift rate
15
Initial carrier
frequency tolerance
–75
75
BLE
Specification
225 to 275
≥ 185
≥ 0.8
≤ ±50
≤ 20
≤ ±100
Unit
kHz
kHz
kHz
kHz/50 ms
kHz
4.3.5 BLE Transceiver, Out-Of-Band and Spurious Emissions
See Section 4.2.7, Bluetooth Transmitter, Out-of-Band and Spurious Emissions.
4.4 Interface Specifications
4.4.1 UART
Figure 4-1 shows the UART timing diagram. Table 4-1 lists the UART timing characteristics.
HCI_RTS
t1
t2
HCI_RX
t6
HCI_CTS
t3
t4
HCI_TX
Start-
bit
10 bits
Stop-
bit
Figure 4-1. UART Timing
td_uart_swrs064
Symbol
Characteristics
Baud rate
Baud rate accuracy per byte
Baud rate accuracy per bit
t3 CTS low to TX_DATA on
t4 CTS high to TX_DATA off
t6 CTS-high pulse width
36
Device Specifications
Table 4-1. UART Timing Characteristics
Condition
Receive and transmit
Receive and transmit
Hardware flow control
Min
Typ
Max Unit
37.5
4000 kbps
–2.5
1.5
%
–12.5
12.5
%
0
2
μs
1
byte
1
bit
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