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| 型號(hào)： | AD6426 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Enhanced GSM Processor |
| 中文描述： | 增強(qiáng)型手機(jī)處理器 |
| 文件頁數(shù)： | 29/50頁 |
| 文件大?。?/td> | 506K |
| 代理商： | AD6426 |
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Preliminary Technical Information
AD6426
This Information applies to a product under development. Its characteristics and specifications are subject to change without notice. Analog Devices assumes no
obligation regarding future manufacture unless otherwise agreed to in writing. No responsibility is assumed by Analog Devices for its use; nor for any
infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent
rights of Analog Devices.
Revision Preliminary 2.3 (June 9, ′98)
- 29 -
Confidential Information
DoBist Instruction
This instruction is provided to support engineering mode test.
When the instruction is loaded, it will generate an NMI to the
H8 processor. This will enable special software to be executed
which can be used to test the operation of the device. During
this time, the 8-bit DoBist register is selected for scan,
enabling a result code for the test to be scanned out. For the
duration of the test, all I/O retain their normal function. The
test program must therefore cope with undefined inputs, but is
able to communicate with other devices to extend the test
procedure. This allows the NMI to be generated during normal
phone operation. This instruction is only valid during the
normal operation of the AD6426; i.e. in Mode A.
Mode D Instruction
This instruction switches the AD6426 into the H8 Emulation
Mode (Mode D). It is only valid to switch modes while the
AD6426 is held in reset.
Reset
To comply with the IEEE specification, the JTAG interface
will be forced to reset whenever the JTAG Port is re-enabled.
This will select the Bypass register and force the AD6426 into
the Normal Mode (Mode A).
Debug Port Interface
In normal (voice-service) operation, the Universal Serial Port
can be used as a monitor port, which allows monitoring
internal operation of the channel codec section. However,
during the use of GSM Data Services, the USC is engaged in
data communication and cannot be used for monitoring. The
6426 provides a Debug Port to enable monitoring and
debugging in this case. This is in the form of a simple 2 pin
UART. The communication format is fixed at 9600 baud, 8
data bits, one stop bit, no parity, asynchronous
communication. Operation of the Debug Port is under control
of the Layer 1 software.
Two of the GPIO pins can be programmed to be used as the
Debug Port:
Pin Name
New Function
GPIO8
GPIO9
TXDATA
RXDATA
The serial port can be enabled by asserting the flag
DATA
SERIAL PORT SELECT
in CC Control Register 7.
MODES OF OPERATION
The AD6426 can be switched between two main operating
modes, using instructions downloaded via the JTAG interface.
This must be done while the AD6426 is held in reset. Once
the instruction load is completed the pins are immediately set
to reflect the new operating mode. Table 23 shows these
modes. The modes B and C are reserved and are not available
to the user.
Table 23. Modes of Operation
Mode of Operation
A
B
C
D
Normal Mode
Reserved
Reserved
Emulation Mode (H8)
Normal Mode (Mode A)
This mode is used during normal operation of the AD6426. All
JTAG-pins have their normal functionality, when enabled by
JTAGEN and can be used for production test.
Emulation Mode (Mode D)
Selecting Mode D allows the emulation of the internal H8
processor. In this Mode several pins assume a new
functionality or are no longer available. Table 24 lists all pins,
which have different functionality or direction in the
Emulation Mode compared to the Normal Mode.
In Emulation Mode the internal DSP remains active but will
not have access to external memory devices. The internal H8
will be switched into hardware stand-by mode; the LCD
controller interface and Boot Code ROM remain functional.
CCIRQ0 : 2 are channel codec interrupts to the emulator.
CCIRQ2 is defined in CC Control Registers 77 and 78.
Table 24. Pin Functions in Mode D
Pin Name in
Normal Mode (A)
IRQ6
ADD19 : 16
ADD15 : 0
DATA7 : 0
RD
HWR
LWR
RAMCS
SIMCARD
SIMDATAOP
SIMDATAIP
SIMCLK
SIMRESET
SIMPROG
SIMSUPPLY
GPIO9
GPIO8
Pin Function in
Emulation Mode (D)
CCCS
-
ADD15 : 0
-
RD
HWR
-
-
-
-
-
-
CCIRQ0
CCIRQ2
CCIRQ1
H8CS0
CCGPIO8
I
TRI
I
TRI
I
I
TRI
TRI
TRI
TRI - O
I
O
O
O
O
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I/O -
TRI
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD6426XB | DIODE, RECTIFIER, DO-201AD, AXIAL LEAD, STANDARD RECOVERY, 400 V, 3 A |
| AD6426XST | 1N5817 DIODE SCHOTTKY 20V 1A DO-41 |
| AD642J | Precision, Low Cost Dual BiFET Op Amp |
| AD642K | SCHOTTKY DIODE DO-204AL 40V 1A |
| AD642L | Precision, Low Cost Dual BiFET Op Amp |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD6426XB | 制造商:AD 制造商全稱:Analog Devices 功能描述:Enhanced GSM Processor |
| AD6426XST | 制造商:AD 制造商全稱:Analog Devices 功能描述:Enhanced GSM Processor |
| AD642J | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, Low Cost Dual BiFET Op Amp |
| AD642JH | 制造商:Rochester Electronics LLC 功能描述:PRECISION DUAL OP AMP IC - Bulk |
| AD642K | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision, Low Cost Dual BiFET Op Amp |
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