Toshiba T3400 - Page 6

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T3400/T3400CT Maintenance Manual
❑ Clock Generator receives 14.31818 MHz (X3) and generates the following frequen-
cies:
• 33 MHz for the CPU
• 14.7477 MHz for the Communications (COM) port
• 24 MHz for the FDC and VFO
• 16 MHz is used for system controller GA
• 14.31818 MHz is used for the SI T9901 GA
❑ Gate Arrays
System Controller GA
This GA has the following functions:
• CPU Controller
• Memory Controller
- DRAM Controller
- Compatible Bus Interface Controller
• SMI Controller
• VL Bus Controller
• Bus Controller
- Compatible Bus Interface Controller
- Compatible Access Controller
- DMAC Controller
- I/O Controller
• Address Latch Controller
- 32 to 16-Bit Controller
- Address Latch
- DMA Address Generator
- Refresh Address Generator
• I/O Register
- Compatible I/O Port
- Saving Register Controller data in AutoResume (resume mode)
- Toshiba Special Register
• Processing Speed Controller
• Data Bus Change Controller
• Data Latch
PCMCIA Controller GA
This GA has the following functions:
• Memory Card Controller
- PCMCIA IC Card Controller
- Toshiba Modem Card Controller