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PDF AT7912E Data sheet ( Hoja de datos )
| Número de pieza | AT7912E | |
| Descripción | Single SpaceWire link High Speed Controller | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Alswowkwn.DoawtanSahseeSt4MUC.cSom116SpW
• Single Bidirectional SpaceWire link allowing
– Full duplex communication
– Transmit rate from 1.25 up to 200 Mbit/s in each direction
– Supports Serial Transfer Universal Protocol (STUP)
• Derived from the T7906 Single Point to Point IEEE 1355 High Speed Controller
– Known anomalies of the T7906 chip corrected
• Host interface
– Gives read/write accesses to the AT7912E configuration registers
– Gives read/write accesses to the SpaceWire channel
• ADC/ DAC interface
– Allows direct connection of an ADC with a width of up to 16 bits
– Allows direct connection of a DAC with up to 16 data lines and the required control
signals
• FIFO interface
• RAM interface
– 16-bit data bus and 16-bit address bus
– Four chip selects to address 4 different memory partitions
• Two independent UART interfaces
• 24 Bidirectional General Purpose I/Os
• Two 32-Bit Timers / Event Counters
• SpaceWire Link Performance
– At 3.3V : 100Mbit/s full duplex communication
– At 5V : 200Mbit/s full duplex communication
• Operating range
– Voltages
• 3V to 3.6V
• 4.5V to 5.5V
– Temperature
• - 55°C to +125°C
• Maximum Power consumption
– At 3.6V with a 5MHz clock: 150mW
– At 5.5V with a 5MHz clock: 700mW
• Radiation Performance
– Total dose tested successfully up to 50 Krad (Si)
– No single event latchup below a LET of 80 MeV/mg/cm2
• ESD better than 2000V
• Quality Grades
– QML-Q or V with SMD
• Package: 100pins MQFPF
• Mass: 3grams
Single
SpaceWire link
High Speed
Controller
AT7912E
7743A–AERO–07/07
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Signal Name(1)(3) Type(2)(4)
Function
5V ± 0.5V
max. output
current [mA]
3.3V ± 0.3V
max. output
current [mA]
load [pF]
TMS
Test Mode Select.
I Used to control the test state machine. This input should be
left unconnected or tied to ground during normal operation
Test Data Input.
TDI I
Provides serial data for the boundary scan logic
TDO
Test Data Output.
O/Z
Serial scan output of the boundary scan path
3 1.5 50
RESET*
AT7912E Reset.
I Sets the AT7912E to a known state. This input must be
asserted (low) at power-up. The minimum width of RESET
low is 2 cycles when CLK is running
CLK
I External clock input to AT7912E (max. 5 MHz)
PLLOUT
Output of internal PLL.
O
Used to connect a network of external RC filter devices.
VCC_3VOLT
PLL Control signal
Configure PLL for 3.3V or 5V operation
I
VCC = 5 Volt: connect this signal with GND
VCC = 3.3 Volt: connect this signal with VCC
VCC
Power Supply
GND
Ground
Notes:
1. Groups of pins represent busses where the highest number is the MSB.
2. O = Output; I = Input; Z = High Impedance
3. (*) = active low signal
4. O/Z = if using a configuration with two AT7912Es these signals can directly be con-
nected together (WIROR)
7743A–AERO–07/07
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5. Operating Modes
www.DataSheet4U.com
5.1 Configuration of the AT7912E
The AT7912E provides registers and ports for configuration. Each register contains
exactly one byte (read / write), whereas a port (e.g. a FIFO interface) behaves like a
FIFO, meaning that multiple data bytes can be read or written from/to the port.
The ports of the AT7912E such as the FIFO, UART, ADC and RAM interfaces are
accessed by a read/write command to the corresponding port address. In the case of
FIFO, Host, UART and memory interfaces, a packet oriented access is also possible
(meaning transferring multiple data bytes with a single command). The read/write selec-
tion of a command is done by setting bit 7 (MSB) of the first byte to one (read) or zero
(write).
All internal registers are 8-bit wide addressable. Two simple commands, read and write,
suffice to access all registers of the AT7912E.
Configuration/Programming of the AT7912E internal registers is done via either a simple
protocol over the SpaceWire link or STUP over the SpaceWire link or directly via the
host interface.
• The simple protocol over the SpaceWire, compatible with the T7906 (SCMCS116)
link requires a command byte and, if necessary, one or more data bytes. The simple
protocol ignores following bytes, if more bytes are sent.
• The STUP over the SpaceWire link uses 4 bytes for commands. It also supports
logical addressing.
• The host interface provides a direct access to the internal registers through a 8-bit
multiplexed address/data bus. After reset, the host interface is enabled.
After a chip reset the AT7912E is configured via the internal controller. This can be
either by receiving the configuration data from the SpaceWire link or by an external con-
troller connected to the host port of the AT7912E.
7743A–AERO–07/07
11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet AT7912E.PDF ] | |
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