SATO WS408TT Technical Manual page 133

9 Technical Drawings System Diagram
Microcontroller (U11)
The microcontroller (MCU) is AT91SAM9260. The MCU is like a microcomputer
which integrates CPU, memory, I/O ports, timers and other components. The CPU
it uses is ARM926-based processor.
Flash memory (U18)
The flash memory stores firmware, graphics, label formats and soft fonts.
SDRAM (U17)
SDRAM is volatile memory, typically storing working buffers and parameters. After
the power is turned off, all of the data is gone.
RS-232 Buffer (U14)
Convert the serial port signal to/from microcontroller to RS-232 voltage level.
Keypad LED Matrix
It is an interface for users to interact with the printer. It has a FEED button and two
LEDs.
Power (U13, U15, D19)
A regulator converts 24V DC to 5V DC as the VCC source for most of components
on main board. LDOs are 5V to 3.3V for I/O, 3.3V to 1.8V for CPU core.
Motor Driver (U2)
The motor driver is BD63877. It acts as an amplifier, which takes low-current
signals and generates high-current signals. Since the motor typically requires
voltages or currents that exceed what the circuitry can provide, the motor driver is
capable of providing higher voltages or currents for the motor.
Ethernet PHY (U9)
It is used to send and receive Ethernet frames. It complies with the IEEE 802.3
specifications for 10BASE-T and 100BASE-TX.
TPH Driver (U4)
The TPH driver IC is used to switch TPH heaters on and off.
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