CS7410-CM Cirrus Logic, CS7410-CM Datasheet - Page 30

• Manufacturer Part Number: CS7410-CM
• Description: CD/MP3/WMA Audio Controller
• Manufacturer: Cirrus Logic

4.2
4.3
30
98
99
100
Pin
Miscellaneous Pins
These pins described in
receiver interface. The main system clock can be derived from an external crystal connected between the
XTLCLK_I and XTLCLK_O pins, or can be received from the CD servo chip via the XTLCLK_I pin. The
CS7410 can accommodate a variety of input frequencies, such as 44.1 KHz x 256, x 384, or x 512.
Serial Interface Pins
The CS7410 Serial Interface pins are described in
with different protocols. The 2-wire serial port (SER1) supports industry standard protocols. This port is typ-
ically used for debug, with the CS7410 as the slave. The slave chip select address is programmable, and
defaults to a 7-bit value of 0x1B. A second serial controller (SER2) supports industry standard 3-wire and
4-wire protocols. In master mode, this interface can control a front panel or a small non-volatile memory. In
slave mode, it can operate under control of an external processor, for example, in a combination unit. The
third serial port (SER3) is a 5-wire master device optimized for reading CD subcodes from the servo chip,
and can also be used a general-purpose serial port.
GPIO_1
GPIO_2
GPIO_3
1. Optional pull up or pull down resistor may be connected to configure internal ROM program
2. Required external resistor required to select processor boot from internal ROM (pull down) or external
3. Drives for a short time after reset, then reverts to high impedance
Pin
Pin
17
18
90
91
60
61
65
66
67
Name
ROM (pull up).
B4
B4
B4
XTLCLK_O
XTLCLK_I
RST_N
TEST
Type
Signal Name
Signal Name
SER1_DAT
SER1_CLK
SER2_CLK
SER2_DO
SER2_DI
Table 8
I
I
I
Reset
Table 7. Pin Assignments (Continued)
Table 8. Miscellaneous Interface Pins
are used for used for basic functions such as clocking, reset and infrared
GPIO[1]
GPIO[2]
GPIO[3]
Table 9. Serial Interface Pins
Type
Type
O
B
B
B
B
I
I
I
I
Function #1
Crystal output
Crystal input, or oscillator input
Asynchronous reset input, active low
Manufacturing test, tie to ground
Debug port serial clock
Debug port serial data
Clock for 4-wire serial port (output for master mode, input
for slave mode)
Input data for 4-wire serial port
Output data for 4-wire serial port – may function as bidi-
rectional data in 3-wire mode.
Table
9. CS7410 has three dedicated serial ports, each
B
B
B
Dir
Description
Description
PWM_Out
Function #2
CS7410
O
Dir
DS553PP1
Note