7-5
2. MCU
2.1 Frequency Specifications
Horizontal Frequency : 29.5kHz to 96kHz
Vertical Frequency : 43Hz to 160Hz
Support of composite sync signals
2.2 System Architecture
1) MCU - Myson MTV212NM32, 32k-byte ROM size.
2) E
2
PROM - 24C08 Series, 8k-bits (initialize enabled by microcomputer).
3) OSD - Myson MTV030N16.
2.3 Inputs
1) Sync input - Two pins for reversal inputs of horizontal sync and vertical sync.
2) Key input - Two pins for A/D key input (EXIT, <, >, -, +, SELECT, RESET).
3) One pin for signaling cable connection sensing (for factory).
4) Reset input - High pulses for MCU reset.
5) Crystal oscillator input - Two pins for using a 12MHz crystal oscillator.
6) Detection of oscillation IC operation - One pin.
7) Detection of protector operation - Three pins for beam current, high voltage, and X rays protector detection.
8) External 5V detection input - One pin.
2.4 Outputs
1) Degaussing - Made to be active for a predetermined time period during degaussing. The MCU executes
degaussing even when the power supply is turned ON.
2) CS output - Four pins for CS control (CS4, CS2, CS1, CS0)
CS3 not used.
3) MUTE - When the sync signal is unstable, this output becomes active to protect the relevant circuits. The two
circuits of MUTE1 and MUTE2 are available.
4) Convergence - Two PWM outputs for horizontal and vertical (19” only).
5) POWER save - Two circuit control pins for power saving.
6) Sync signal output - Two pins for horizontal sync and vertical sync.
7) Rotation - One PWM output pin for rotation circuit control.
8) DDC communication - Communication port of DDC-DDC2B or DDC/CI. Two circuits of HSCL and HSDA.
9) ISDA/ISCL - Two pins for EEPROM, OSD IC, OSC IC, and PRE-AMP IC.
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