MC72000 Freescale Semiconductor, MC72000 Datasheet - Page 98

• Manufacturer Part Number: MC72000
• Description: Integrated Bluetooth Radio
• Manufacturer: Freescale Semiconductor

RESET:
RESET:
W
W
Hardware Functional Description
TEFS—Transmit Early Frame Sync
7.4.5.2.10
The STSR is used when data is not to be transmitted in an available transmit time slot. For the purposes of
timing, the time slot register is a write-only register that behaves like an alternate transmit data register,
except that instead of transmitting data, the STXD signal is tri-stated. Using this register is important for
avoiding overflow/underflow during inactive time slots.
7.4.5.2.11
This register provides for configuration of the transmit and receive FIFO registers and allows for reporting
of the amount of data contained in each FIFO.
RFCNT[3:0]—Receive FIFO Counter
.
98
R
R
This bit controls when the frame sync is initiated for the transmit and receive sections. See Figure 60
for an example timing diagram of the FS options.
This read-only bit field indicates the number of data words in the RXFIFO. Table 45 shows the
RFCNT[3:0] bit field encoding.
1 = Frame sync is initiated one bit before the data is transmitted.
0 = Frame sync is initiated as the first bit of data is transmitted.
15
15
x
The frame sync is disabled after one bit-for-bit length frame sync and after one word-for-word
length frame sync.
RFCNT[3:0]
= Unimplemented or Reserved (write as 0)
14
14
= Unimplemented or Reserved
x
SSI Time Slot Register (STSR)
SSI FIFO Control/Status Register (SFCSR)
13
13
x
12
12
Freescale Semiconductor, Inc.
Dummy Register, written during inactive time slots (Network Mode)
x
0000
0001
0010
0011
0100
0101
Bits
For More Information On This Product,
MC72000 Advance Information Data Sheet
Figure 63. SFCSR Register Diagram
11
Figure 62. STSR Register Diagram
11
x
Table 45. RFCNT[3:0] Encoding
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TFCNT[3:0]
10
10
x
Base + 0x0C
Base + 0x0E
Preliminary
9
9
x
0 data words in RXFIFO
1 data words in RXFIFO
2 data words in RXFIFO
3 data words in RXFIFO
4 data words in RXFIFO
5 data words in RXFIFO
Description
8
x
8
7
7
x
RFWM[3:0]
6
x
6
5
x
5
4
4
x
3
x
3
TFWM[3:0]
MOTOROLA
2
x
2
1
1
x
0
x
0