tc94a04afdg TOSHIBA Semiconductor CORPORATION, tc94a04afdg Datasheet - Page 10

• Manufacturer Part Number: tc94a04afdg
• Description: 1 Chip Audio Digital Processor
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.1.3 Setting RAM (ACMP mode)
to the interface buffer RAM (IFB-RAM). Then, all the data are updated together in a period of 1 fs.
applies to the K6 to K10 data.
Please set up again after initializing by RST terminal or the initialization command.
In ACMP mode, the TC94A04AFG/AFDG does not write data directly to coefficient RAM (CRAM) or offset RAM (OFRAM). In this mode, data must be written
For example, if a signal flow filter is designed as in the following diagram, unless the K1 to K5 data are batch-updated, the circuit may resonate. The same
Using ACMP mode can reduce the noise caused by updating coefficients while the TC94A04AFG/AFDG is operating.
IFB-RAM is 32-word memory. Therefore, data can be updated at one time in units of up to 32-words.
The length of the data field is 2 × n bytes, where n < = 32.
In addition, operation at the time of transmitting other commands, before package rewriting of the data by ACMP mode was completed cannot be guaranteed.
IFCK
IFDI
CS
Don’t care
C7
C6
C5
C4
K1
K2
K3
C3
C2
+
C1
C0
K4
K5
A15
A14
A13
A12
K6
K7
K8
A11
A10
+
A9
K10
K9
A8
A7
A6
A5
A4
A3
A2
A1
Write one by one ･･･
A0
10
MCU-I/F
D15
D14
D13
D12
D11
D10
D9
D8
IFB-RAM
D7
D6
D5
D4
D3
D2
D1
D0
Update for 1 fs
CRAM
D1
D0
Cn: COMMAND
An: ADDRESS
Dn: Data
TC94A04AFG/AFDG
Don’t care
2005-09-28