Part 3: Technical Reference | S600 |
7.Print head control
Serial print data is sent to the print head.
The transfer clock is 6 MHz. Since data latch occurs at the clock's
Also, the print head heater's heating is executed with a single pulse or double pulse. In the case of a double pulse, the first pulse is a press pulse. The pulse following it becomes the main pulse.
The print head's temperature is estimated with the dot count. Based on the estimated temperature, suitable heating is executed with the voltage value.
8.Motor control
The encoder signals input from the two DC motors are processed, and a signal for the
b)MPU (IC203)
The MPU contains a
Built-in CPU
The
Address bus/Data bus
This operates in synchronization with a 20 MHz external clock input. An external RAM (16 Mbit) is accessed via the
Interrupt controller
The MPU receives external interrupts from the POWER button'sON/OFF and I/F.
A/D converter
The following analog signals are detected after they pass through the
Resume key input EEPROM data I/O EEPROM chip select output Door sensor input
CSB power input
Sensor (purge, paper end, sheet feeder) inputs LED (ERROR/POWER) outputs
I/F (Centronics/CSB)
Ink sensor power control (ON/OFF)
Purge motor control (4 ports, A/B/A/B phase)
I/O port
The I/O port executes the following control operations.
c)DRAM (IC103)
The 16 Mbit DRAM is controlled by the printer controller and used as a receiving buffer, download buffer, print buffer, and working area.
