Panasonic Panafax UF-4000, Руководство по обслуживанию

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1. System CPU
The System CPU (V850E/MA1) is a 32-bit RISC (Reduced Instruction Set Computer) type of CPU and
DMA Control, Serial Communication Port, Timer Control, Interrupt Control, DRAM Control, and I/O Port
are integrated into Single (1) Chip. Mask ROM (128k byte) is already installed and it controls the Real
Time OS, High Speed managing Task and Boot Programming.
• DMA Control
It has a 4ch DMA Control and is used to transfer data between the following devices.
Image Data Memory (DRAM)
←→
Image Data Memory (DRAM)
• Serial Communication Port
It has a 2ch Serial Communication Port and is used to interface the following devices.
CPU
←→
Panel Unit (Panel CPU)
• Timer Control
It is used to program the standard timer, the creation of the charge AC frequency.
• Interrupt Control
It controls receipt & transfer to CPU the interrupt from SHINE, Modem.
• S-DRAM Control
It generates S-DRAM Control Signal and Refresh Control when the power is ON.
• I/O Port
It is used to control lines, reset control around LSI, and so on.
2. Integrated Gate Array (SHINE)
DZAC000273 (SHINE) is a Highly Integrated Gate Array which provides the function of System
Control, Scanning Control, Recording Data Control, LP Engine Control, PC Interface.
• 2-1. System Control Block
• DMA Control
It is used to transfer data between the following devices.
Scanning Control LSI (MN860741)
→
Memory (S-DRAM) : Scanning Route
Memory (S-DRAM)
→
LP : Recording Route
PC
←→
Memory (S-DRAM) : PC I/F Route
Memory (S-DRAM)
←→
Memory (S-DRAM) : Editing Route
• S-DRAM Control
It generates S-DRAM Control Signal. It shares S-DRAM with the CPU by using the Bus Hold
Mode function of the CPU.
• System Control Signals Generation
It generates various system control signals for the CPU assistance.
• 2-2. Scanning Control Block
• CIS Control Signal Generation
It generates CIS control signals.
CIS stands for Contact Image Sensor, which is compact scanning Device.
• Black Shading Correction
To suppress dispersion of CIS pixel elements, it compares with a black signal (LED is off) as a
base level, it corrects analog data level by controlling values of external resistors.