sta015t STMicroelectronics, sta015t Datasheet - Page 27

• Manufacturer Part Number: sta015t
• Description: Mpeg 2.5 Layer Iii Audio Decoder With Adpcm Capability
• Manufacturer: STMicroelectronics

FRAME_CNT_L
FRAME_CNT_M
FRAME_CNT_H
Address: 0x67, 0x68, 0x69 (103 - 104 - 105)
Type: RO
Software Reset: 0x00
Hardware Reset: 0x00
The three registers are considered logically con-
catenated and compose the Global Frame
Counter as described in the table.
It is updated at every decoded MPEG Frame.
The registers are reset on both hardware and
software reset.
AVERAGE_BITRATE
Address: 0x6A (106)
Type: RO
Software Reset: 0x00
Hardware Reset: 0x00
AVERAGE_BITRATE is a read-only register and
it contains the average bitrate of the incoming bit-
stream. The value is rounded with an accuracy of
1 Kbit/sec.
SOFTVERSION
Address: 0x71 (113)
Type: RO
FC15 FC14 FC13 FC12 FC11 FC10 FC9
FC23 FC22 FC21 FC20 FC19 FC18 FC17 FC016
MSB
MSB
MSB
MSB
FC7
AB7
b7
b7
b7
b7
FC6
AB6
b6
b6
b6
b6
FC5
AB5
b5
b5
b5
b5
FC4
AB4
b4
b4
b4
b4
FC3
AB3
b3
b3
b3
b3
FC2
AB2
b2
b2
b2
b2
FC1
AB1
b1
b1
b1
b1
LSB
LSB
LSB
LSB
FC0
FC8
AB0
b0
b0
b0
b0
After the STA015 boot, this register contains the
version code of the embedded software.
RUN
Address: 0x72 (114)
Type: RW
Software Reset: 0x00
Hardware Reset: 0x00
Setting this register to 1, STA015 leaves the idle
state, starting the decoding process.
The Microcontroller is allowed to set the RUN
flag, once all the control registers have been in-
itialized.
TREBLE_FREQUENCY_LOW
Address: 0x77 (119)
Type: RW
Software Reset: 0x00
Hardware Reset: 0x00
TREBLE_FREQUENCY_HIGH
Address: 0x78 (120)
Type: RW
Software Reset: 0x00
Hardware Reset: 0x00
The registers TREBLE_FREQUENCY-HIGH and
TREBLE_FREQUENCY-LOW, logically concate-
nated as a 16 bit wide register, are used to select
the frequency, in Hz, where the selected fre-
quency is +12dB respect to the stop band.
By setting these registers, the following rule must
be kept:
Treble_Freq < Fs/2
TF15 TF14 TF13 TF12 TF11 TF10
MSB
MSB
MSB
MSB
SV7
TF7
b7
b7
b7
b7
X
SV6
TF6
b6
b6
b6
b6
X
SV5
TF5
b5
b5
b5
b5
X
STA015-STA015B-STA015T
SV4
TF4
b4
b4
b4
b4
X
SV3
TF3
b3
b3
b3
b3
X
SV2
TF2
b2
b2
b2
b2
X
SV1
TF1
TF9
b1
b1
b1
b1
X
LSB
SV0
LSB
RUN
LSB
LSB
TF0
TF8
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b0
b0
b0
b0