SA58635 NXP Semiconductors, SA58635 Datasheet - Page 4

• Manufacturer Part Number: SA58635
• Manufacturer: NXP Semiconductors

NXP Semiconductors
7. Functional description
SA58635_1
Product data sheet
7.1 Device address
7.2 Control register
7.3 Register definitions
Refer to
Following a START condition, the bus master must output the address of the slave it is
accessing.
The SA58635 responds to two slave addresses: 1100 000xb for standard accesses and
the General Call writes (0000 0000b) for software reset. The last bit of the address byte
defines the operation to be performed. When set to logic 1 a read is selected, while a
logic 0 selects a write operation.
When a reset of the I
the General Call address followed by a write of the reset command (0000 0110b). When a
General Call reset command is sent by the master, the SA58635 will respond with an
acknowledge and execute a reset to the digital logic. This will return the register set and
the volume controls to the Power-On Reset (POR) values.
Following the successful acknowledgement of the slave address, the bus master will send
a byte to the SA58635, which will be stored in the Control register.
The lowest 3 bits are used as a pointer to determine which register will be accessed
(D[2:0]). The remaining bits are not used and are ignored.
Table 3.
Register
number
(hex)
00
01
02
03
04
05
06
07
Figure 1 “Block diagram of
Register summary
Name
-
MODE1
VOLCTL
HIZ
ID
-
TEST1
-
2
C-bus needs to be performed by the master, the master will write to
Rev. 01 — 26 March 2010
Type
-
read/write
read/write
read/write
read only
-
read/write
read/write
SA58635”.
Function
Reserved; this address is empty and will be NACKed.
Contains the left and right channel amplifier enable bits,
thermal status and the software shutdown bit.
Volume setting and mute left and right bits.
High-impedance controls for left and right channel.
Vendor Identification and chip version number.
Reserved; this address is empty and will be NACKed.
This register is for manufacturing test.
Reserved; this register is empty and will be NACKed.
2 × 25 mW class-G stereo headphone driver
SA58635
© NXP B.V. 2010. All rights reserved.
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