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Bus Sizer
The MPC603e processor does not support dynamic bus sizing, as did the 68k
family. Many parts of the software and the hardware rely on that feature. A Motorola
MC68150 chip ‘translates’ the PowerPC 32-bit data bus to a 68030 8 or 16-bit bus.
Except DRAM and VGA controller, all peripherals work on this 68k-type bus. Full
compatibility is therefore ensured with current acquisition boards and small
peripherals.
16 and 8-bit Peripherals
The only 16-bit peripheral hooked on the bus is the acquisition board.
RETINE (A36) generates wait state timings and is used to switch between cold boot
(return to default state) and warm boot (do a RESET, but keep current scope
settings), and generates a bus error if max. access time is out and no peripheral
has acknowledged the access.
ASSISE (A21) generates chip select signals for the bus sizer, BUDGET (A28)
creates typical 68k signals (_BAS, _BDS, 16MHz clock).
The peripheral address decoding is done by a set of GALs (GRANDS (A20),
PETITS (A29)) and a few multiplexers (A30, A22). GRANDS selects between main
peripheral categories (VGA, DRAM, memory card, flash PROM, acquisition board
or other peripherals), PETITS generates chip select signals for 8-bit peripherals
(flash PROM, memory card, non-volatile RAM, Centronics and “others”). It also
determines how many wait states are needed for peripherals not able to
acknowledge a bus access. This is done by pulling low _DSACK0 after having
sensed the corresponding number of wait states trough _BWT1 and _BWT3, which
ends the current access.
The multiplexer A30 does a finer decoding between “others” decoded in PETITS,
namely interrupt controller, small peripherals, serial interface, flash PROM chip 1 or
2, and status registers.
PCMCIA type I / II interface
This interface consists mainly of buffers for both data and address busses.
An OP amp (A10) and a MOS transistor (Q3) allow to switch off the memory card
power supply while no card is plugged in, and turn it on slowly when plugged in.
The GAL CARDAN (A11) handles the card format and generates several control
signals
accordingly.
A16 (an hex D-type flip-flop) holds control bits for 12Vpp (flash programming
voltage), DRAM memory mapping and memory card type. All bits of this register
reset to zero when the _RESET signal goes active low, which means that their state
is also guaranteed at power-up.
A9 and A12 are the read registers for several status bits.
Several EXOR gates (A17 and A18) invert the most significant address bits of the
memory card whenever the SWAP jumper is plugged in, so that the first bytes are
always located at 0xFFF00000, regardless of the size of the memory card. This
allows to boot directly from a PCMCIA memory card.
Theory of Operation
4-5
Содержание LC564DL
Страница 12: ...x Table of Contents ...
Страница 18: ...2 4 General Information ...
Страница 46: ...4 22 Theory of Operation 4 6 2 Power Supply Block Diagram ...
Страница 59: ...Performance Verification 5 13 ...
Страница 70: ...5 24 Performance Verification ...
Страница 95: ...Performance Verification 5 49 ...
Страница 115: ...Performance Verification 5 69 ...
Страница 122: ...5 76 Performance Verification Figure 5 14 1MΩ Ω Ω Ω Rise time Equipment Setup ...
Страница 148: ...6 14 Maintenance 6 6 4 Fan Problem ...
Страница 149: ...6 6 5 Power Supply Voltages Problem Maintenance 6 15 ...
Страница 150: ...6 16 Maintenance 6 6 6 Display Problem ...
Страница 151: ...6 6 7 Front Panel Controls Do not Operate Maintenance 6 17 ...
Страница 152: ...6 18 Maintenance 6 6 8 Remote Control GPIB or RS232 Problem ...
Страница 153: ...6 6 9 Performance Verification Fails Maintenance 6 19 ...
Страница 154: ...6 20 Maintenance 6 6 10 Floppy Disk Drive Problem ...
Страница 155: ...6 6 11 Graphic Printer Problem Maintenance 6 21 ...
Страница 156: ...6 22 Maintenance 6 6 12 Centronics Problem ...
Страница 157: ...6 6 13 Hard Disk Drive Problem Maintenance 6 23 ...
Страница 158: ...6 24 Maintenance ...
Страница 181: ...Mechanical Parts 8 1 8 Mechanical Parts Figure 8 1 LC564DL Cabinet ...
Страница 182: ...8 2 Mechanical Parts Figure 8 2 LC564DL Chassis Assembly ...
Страница 184: ...8 4 Mechanical Parts Figure 8 3 Power Supply Installation ...
Страница 185: ...Mechanical Parts 8 5 Figure 8 4 Lower Cover Assembly ...
Страница 187: ...Mechanical Parts 8 7 Figure 8 5 Lower Cover Assembly with CKTRIG Option ...
Страница 188: ...8 8 Mechanical Parts Figure 8 6 Lower Cover ...
Страница 190: ...8 10 Mechanical Parts Figure 8 7 CKTRIG Option ...
Страница 191: ...Mechanical Parts 8 11 Figure 8 8 Rear Panel Assembly ...
Страница 193: ...Mechanical Parts 8 13 Figure 8 9 900079 Main Board Assembly ...
Страница 194: ...8 14 Mechanical Parts Figure 8 10 900079 Main Board Assembly ...
Страница 196: ...8 16 Mechanical Parts Figure 8 11 Upper Shield Assembly ...
Страница 197: ...Mechanical Parts 8 17 Figure 8 12 Front Frame Assembly ...
Страница 199: ...Mechanical Parts 8 19 Figure 8 13 Keypad Assembly ...
Страница 200: ...8 20 Mechanical Parts Figure 8 14 Fan Assembly ...
Страница 202: ...8 22 Mechanical Parts Figure 8 15 Graphic Printer Assembly ...
Страница 203: ...Mechanical Parts 8 23 Figure 8 16 Upper Cover Assembly ...
Страница 205: ...Mechanical Parts 8 25 Figure 8 17 Hard Disk Assembly ...
Страница 206: ...8 26 Mechanical Parts Figure 8 18 Centronics VGA Interface Assembly ...
Страница 207: ...Mechanical Parts 8 27 Figure 8 19 Floppy Disk Assembly ...
Страница 209: ...Mechanical Parts 8 29 Figure 8 20 LC564DL Dimensions ...
Страница 210: ...8 30 Mechanical Parts Figure 8 21 LC564DL Packaging ...