MC72000 Freescale Semiconductor, MC72000 Datasheet - Page 104

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

RESET:
RESET:
W
W
Hardware Functional Description
The receive slot mask registers are two 16-bit read/write registers. In network mode, these registers are used
by the receiver to determine which action to take in the current time slot. Depending on the setting of the
bits, the receiver either ignores the receiver data signal(s) or receives a data word and generates the
appropriate receive status.
When the bits in the RSM are set, their settings affect the next frame reception. The frame currently being
received is not affected by the new RSM setting. If the RSM is read, it shows the current setting.
After a hardware RESET signal or executing a DSP software RESET instruction, the RSM register is reset
to $FFFFFFFF; that value enables all 32 time slots for data reception. The receive DC setting determines
how many of these control bits are actually used.
7.4.5.3.1
This register can be read at any time to determine the current time slot of the frame. This register is only
useful for network mode.
RTSCNT — Receive Time-Slot Count
104
R
R
RSMA and RSMB can be viewed as one 32-bit register, RSM. Bit n in RSM (RSMn) is an enable/
disable control bit for time slot number N.
During a disabled slot, no receiver full interrupt is generated. The DSP is interrupted only for enabled
slots.
This read-only bit field indicates the current time-slot number within the receive frame. This count will
indicate the specific bit of the RSM that is currently active. The value of this field will change with the
receive word count clock (see Figure 78).
1 = Receive sequence proceeds normally.
0 = Data is not transferred from the receive shift register (RXSR) to the receive data register (SRX)
15
15
1
0
Data is received during slot number N, and the RDR flag is set.
and, therefore, the RDR and ROE flags are not set.
= Unimplemented or Reserved (write as 0)
14
14
= Unimplemented or Reserved
1
0
SSI Frame Status Register (SFSR)
13
13
1
0
12
12
Freescale Semiconductor, Inc.
1
0
For More Information On This Product,
MC72000 Advance Information Data Sheet
Figure 69. RSMB Register Diagram
11
11
Figure 70. SFSR Register Diagram
1
0
RTSCNT
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10
10
1
0
Base + 0x1A
Base + 0x1C
Preliminary
9
1
9
0
RSMA[31:16]
8
1
8
0
7
1
7
0
6
1
6
0
5
1
5
0
4
1
4
0
3
1
3
0
TTSCNT
MOTOROLA
2
1
2
0
1
1
1
0
0
1
0
0