821054PQF Integrated Device Technology (Idt), 821054PQF Datasheet - Page 43

• Manufacturer Part Number: 821054PQF
• Description: Audio Codec 4ADC / 4DAC 64-Pin PQFP
• Manufacturer: Integrated Device Technology (Idt)
• Type: PCMr

Specifications of 821054PQF

• Package: 64PQFP
• Number Of Channels: 4ADC /4 DAC
• Number Of Dacs: 4
• Operating Supply Voltage: 5 V

IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
9
into 5 blocks with 8 words per block, so, only 3 address bits are needed to locate each of the block. When the address of a Coe-RAM block (b[2:0]) is
specified in a Coe-RAM command, all 8 words of this block will be addressed automatically, with the highest order word first (The IDT821054 will count
down from '111' to '000' so that it accesses the 8 words successively). Refer to
Coe-RAM word. As the IDT821054 handles the lower 3 bits of address automatically, only the higher 3 bits of address (in bold style) are needed for a
Coe-RAM Command. It should be noted that, when addressing the GRX RAM, the FRR RAM will be addressed at the same time.
Table - 5 Coe-RAM Address Allocation
Block # Word #
Generally, 6 bits of address are needed to locate each word of the 40 Coe-RAM words. In the IDT821054, the 40 words of Coe-RAM are divided
The address assignment for the 40 words of Coe-RAM is as shown in
5
4
3
APPENDIX: IDT821054 COE-RAM MAPPING
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
Address
100,110
100,101
100,100
100,011
100,010
100,001
100,000
011,110
011,101
011,100
011,011
011,010
011,001
011,000
010,110
010,101
010,100
100,111
011,111
010,111
Block #
5
4
3
2
1
Frequency Coefficient of Tone Generator 1
Frequency Coefficient of Tone Generator 0
Amplitude Coefficient of Tone Generator 1
Amplitude Coefficient of Tone Generator 0
Word #
39
32
31
24
23
16
15
8
7
0
GRX RAM
FRR RAM
GTX RAM
FRX RAM
Function
b[2:0] of a Coe-RAM
Command
Figure - 13 Coe-RAM Mapping
100
011
010
001
000
Channel1
43
Table -
Block # Word #
3
2
1
“3.1.4 Addressing the Coe-RAM”
5. The number in the “Address” column is the actual address of each
Channel2
TONE RAM
GRX RAM
FRR RAM
GTX RAM
FRX RAM
ECF RAM
GIS RAM
IMF RAM
19
18
17
16
15
14
13
12
10
11
9
8
7
6
5
4
3
2
1
0
Channel3
Address
010,011
010,010
010,001
010,000
001,110
001,101
001,100
001,011
001,010
001,001
001,000
000,110
000,101
000,100
000,011
000,010
000,001
000,000
001,111
000,111
Channel4
INDUSTRIAL TEMPERATURE RANGE
for details.
ECF RAM
GIS RAM
IMF RAM
Function