Harman Kardon AVR 350 (serv.man5) Service Manual ▷ View online
M24C64, M24C32
SUMMARY DESCRIPTION
These I
2
C-compatible electrically erasable pro-
grammable memory (EEPROM) devices are orga-
nized as 8192 x 8 bits (M24C64) and 4096 x 8 bits
(M24C32).
nized as 8192 x 8 bits (M24C64) and 4096 x 8 bits
(M24C32).
Figure 2. Logic Diagram
I
2
C uses a two-wire serial interface, comprising a
bi-directional data line and a clock line. The devic-
es carry a built-in 4-bit Device Type Identifier code
(1010) in accordance with the I
es carry a built-in 4-bit Device Type Identifier code
(1010) in accordance with the I
2
C bus definition.
The device behaves as a slave in the I
2
C protocol,
with all memory operations synchronized by the
serial clock. Read and Write operations are initiat-
ed by a Start condition, generated by the bus mas-
ter. The Start condition is followed by a Device
Select Code and Read/Write bit (RW) (as de-
scribed in
serial clock. Read and Write operations are initiat-
ed by a Start condition, generated by the bus mas-
ter. The Start condition is followed by a Device
Select Code and Read/Write bit (RW) (as de-
scribed in
Table 3.
), terminated by an acknowl-
edge bit.
When writing data to the memory, the device in-
serts an acknowledge bit during the 9
When writing data to the memory, the device in-
serts an acknowledge bit during the 9
th
bit time,
following the bus master’s 8-bit transmission.
When data is read by the bus master, the bus
master acknowledges the receipt of the data byte
in the same way. Data transfers are terminated by
a Stop condition after an Ack for Write, and after a
NoAck for Read.
When data is read by the bus master, the bus
master acknowledges the receipt of the data byte
in the same way. Data transfers are terminated by
a Stop condition after an Ack for Write, and after a
NoAck for Read.
Table 2. Signal Names
Power On Reset: V
CC
Lock-Out Write Protect
In order to prevent data corruption and inadvertent
Write operations during Power-up, a Power On
Reset (POR) circuit is included. At Power-up, the
internal reset is held active until V
Write operations during Power-up, a Power On
Reset (POR) circuit is included. At Power-up, the
internal reset is held active until V
CC
has reached
the Power On Reset (POR) threshold voltage, and
all operations are disabled – the device will not re-
spond to any command. In the same way, when
V
all operations are disabled – the device will not re-
spond to any command. In the same way, when
V
CC
drops from the operating voltage, below the
Power On Reset (POR) threshold voltage, all op-
erations are disabled and the device will not re-
spond to any command.
A stable and valid V
erations are disabled and the device will not re-
spond to any command.
A stable and valid V
CC
(as defined in
Table 9.
and
Table 10.
) must be applied before applying any
logic signal.
Figure 3. DIP, SO, TSSOP and UFDFPN
Connections
Connections
Note: See
PACKAGE MECHANICAL
section for package dimen-
sions, and how to identify pin-1.
AI01844B
3
E0-E2
SDA
VCC
M24C64
M24C32
M24C32
WC
SCL
VSS
E0, E1, E2
Chip Enable
SDA
Serial Data
SCL
Serial Clock
WC
Write Control
V
CC
Supply Voltage
V
SS
Ground
SDA
VSS
SCL
WC
E1
E0
VCC
E2
AI01845C
M24C64
M24C32
M24C32
1
2
3
4
8
7
6
5
harman/kardon
AVR 347/230, AVR 350/230 Semiconductor Pinouts
Page 29 of 51
©2001 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.1
Features
• Output Current up to 1A
• Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24V
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection
• Output Voltages of 5, 6, 8, 9, 10, 12, 15, 18, 24V
• Thermal Overload Protection
• Short Circuit Protection
• Output Transistor Safe Operating Area Protection
Description
The MC78XX/LM78XX/MC78XXA series of three
terminal positive regulators are available in the
TO-220/D-PAK package and with several fixed output
voltages, making them useful in a wide range of
applications. Each type employs internal current limiting,
thermal shut down and safe operating area protection,
making it essentially indestructible. If adequate heat sinking
is provided, they can deliver over 1A output current.
Although designed primarily as fixed voltage regulators,
these devices can be used with external components to
obtain adjustable voltages and currents.
terminal positive regulators are available in the
TO-220/D-PAK package and with several fixed output
voltages, making them useful in a wide range of
applications. Each type employs internal current limiting,
thermal shut down and safe operating area protection,
making it essentially indestructible. If adequate heat sinking
is provided, they can deliver over 1A output current.
Although designed primarily as fixed voltage regulators,
these devices can be used with external components to
obtain adjustable voltages and currents.
TO-220
D-PAK
1. Input 2. GND 3. Output
1
1
Internal Block Digram
MC78XX/LM78XX/MC78XXA
3-Terminal 1A Positive Voltage Regulator
harman/kardon
AVR 347/230, AVR 350/230 Semiconductor Pinouts
Page 30 of 51
harman/kardon
AVR 347/230, AVR 350/230 Semiconductor Pinouts
Page 31 of 51
harman/kardon
AVR 347/230, AVR 350/230 Semiconductor Pinouts
Page 32 of 51
Click on the first or last page to see other AVR 350 (serv.man5) service manuals if exist.