lc89170m Sanyo Semiconductor Corporation, lc89170m Datasheet - Page 6

• Manufacturer Part Number: lc89170m
• Description: Cd Player Text Data Ic
• Manufacturer: Sanyo Semiconductor Corporation

The EXCK clock characteristics are determined by SW2 as listed in the table below.
EXCK Clock Selection by SW2
The upper boxes assume MCK = 16.934 MHz
The lower boxes indicate the relationship with MCK (T
• Microcontroller interface
The LC89170M includes a 32-word
R to W can be read out once every 3.3 ms (or once every 1.66 for double-speed playback) over the microcontroller
interface. Figure 3 shows the timing.
The 1PACK 24 symbols for the subcode R to W data (18 bytes) are entered into the dual-port RAM and input to the CRC
checking circuit. After the data for 1 PACK has all been input, a falling edge is output from the DQSY pin and the CRC
flags are output from SRDT. A high is output for the CRC flags if the check returned OK. Next, 128 bits of data are
output by inputting the SCLK clock signal. A single packet of data is output by repeating this operation four times.
SW1
[L]
[L]
SW2
[H]
[L]
208T
320T
12.28
18.90
t
CD
MCK
MCK
128T
32T
Figure 3 Microcontroller Interface Output Timing
1.89
7.56
t
WH
MCK
MCK
8-bit dual-port RAM on chip, and the 1PACK 24 symbols from subcode channels
128T
MCK
32T
1.89
7.56
t
WL
MCK
= 1/MCK)
MCK
Unit
µs
µs
µs
µs
LC89170M
No. 5536-6/8