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C68000 PDF даташит

Спецификация C68000 изготовлена ​​​​«Cast» и имеет функцию, называемую «16-bit Microprocessor Megafunction».

Детали детали

Номер произв C68000
Описание 16-bit Microprocessor Megafunction
Производители Cast
логотип Cast логотип 

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C68000 Даташит, Описание, Даташиты
C68000
16-bit Microprocessor
Megafunction
General Description
Features
The C68000 is megafunction of a powerful
16/32-bit microprocessor and is derived from the
Motorola MC68000 microprocessor. The C68000
www.DataSheet4U.icsoamfully functional 32-bit internal and 16-bit
external equivalent for the MC68000. The
C68000 serves interrupts and exceptions, and
provides an interface for M6800 family
peripherals.
The C68000 is the microcode-free design
developed for reuse in ASIC and FPGA
implementations. The design is strictly
synchronous without internal tri-states and with a
synchronous reset.
Symbol
C68000
addr
clk addrz
fc
e
vma
vpa_n
berr_n
datai
datao
dataz
ctrlz
as_n
rw
uds_n
lds_n
reseti_n
reseto_n
halti_n
halto_n
dtack_n
br_n
bg_n
bgack_n
ipl_n
Control Unit
ƒ 16-bit two levels instruction decoder
ƒ Three levels instruction queue
55 instructions and 14 address modes
Supervisor and User mode
ƒ Independent stack for both modes
Users registers
ƒ Eight 32-bit data & address registers
ƒ 16-bit status register
Data format
ƒ Integer 8, 16 or 32-bit
ƒ BCD packet
ƒ Bit
Memory interface
ƒ Independent data and address buses
ƒ Asynchronous bus control
ƒ 4 GB-address space
ƒ 31-bit address bus (optional 32-bit)
ƒ 8-address spaces (used 5)
ƒ 16-bit data bus
Interrupt Controller
ƒ Seven Priority Levels
ƒ Unlimited interrupt sources
ƒ Vectored or auto-vectored interrupt
modes
Arithmetic-Logic Unit
ƒ 8, 16, 32-bit arithmetic and logic
operations
ƒ Boolean manipulations
ƒ 16 x 16-bit multiplication (sign or
unsigned)
ƒ 32 / 16-bit division (sign or unsigned)
M6800 peripherals family synchronous
interface
Two or Three wire bus arbitration interface
Operation execution is the same for data or
address registers
ƒ No different for operation on data or
address registers
CAST, Inc.
March 2004
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C68000 Даташит, Описание, Даташиты
C68000 Megafunction Datasheet
Pin Description
Name Type Polarity/ Description
Bus size
p0i I 8
Port 0: is an 8-bit bi-directional I/O port with separated inputs and outputs. Port 0 is also
p0o O 8
the multiplexed low-order address and data bus during accesses to external program and
data memories.
p1i I 8
Port 1: is an 8-bit bi-directional I/O port with separated inputs and outputs. Port 1 also
p1o O 8
serves special features.
p2i I 8
Port 2: is an 8-bit bi-directional I/O port with separated inputs and outputs. Port 2 emits
p2o O 8
the high-order address byte during fetches from external program memory that use 16-bit
addresses (MOVX @DPTR).
p3i I 8
Port 3: is an 8-bit bi-directional I/O port with separated inputs and outputs. Port 3 also
p3o O 8
serves special features.
www.DataSheet4U.cclokm
I Rise
Clock: Is an input of pulse for internal clock counters and all synchronous circuits
rtcx I Rise Timekeeping clock: is a 32.768 kHz pulse supplies the time-base for the Real Time Clock
reset I High
Hardware reset input:
A high on this pin for two clock cycles while the oscillator is running resets the device
pfi
I High
Power Fail Interrupt:
The input of off-megafunction voltage comparator, which generates early warning interrupt
ea
I Low
External Access Enable:
The ‘ea’ must be externally held low to enable the device to fetch code from external
program memory0000H and 0FFFH. If ‘ea’ is held high, the device executes from in-circuit
program memory unless the Program counter contains an address greater than 0FFFH.
ale
O High
Address Latch Enable:
The output pulse for latching the low byte of the Address during an access to external
memory. In normal operations, ‘ale’ is driven at a constant rate of 1/6 the oscillator
frequency.
psen
O Low
Program Store Enable:
The read strobe to external program memory. When the C68000 is executing code from the
external program memory, ‘psen’ is activated each machine cycle, ‘psen’ is not activated
during fetches from in-circuit program memory.
Internal Program Memory interface:
romdatai O
8
Memory data bus
romaddr O
14
Memory address bus
romoe O
High
Memory output enable
Internal Data Memory interface:
ramdatai I
8
Memory data bus input
ramdatao O
8
Memory data bus output
ramaddr O
8
Memory address bus
ramwe O
High
Memory write enable
ramoe O
High
Memory output enable
External Special Function Registers interface:
sfrdatai I
8
SFR data bus input
sfrdatao O
8
SFR data bus output
sfraddr O
7
SFR address bus
sfrwe O High
SFR write enable
sfroe
O High
SFR output enable
Applications
Microcomputer systems
Embedded microcontroller systems
Data computation and transfer
Communication systems
Professional audio and video
CAST, Inc.
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C68000 Даташит, Описание, Даташиты
Block Diagram
www.DataSheet4U.com
Data Registers
DO
D1
D2
D3
D4
D5
D6
D7
TMPD
Address Registers
A0
A1
A2
A3
A4
A5
A6
A7
TMPA
Program counter
PC
PC Arith Unit
Special Registers
A7 '
S
CC
Other special
registers
ipl_n
Interrupt control
Interrupt
and
Exception
Control
Unit
CAST, Inc.
C68000 Megafunction Datasheet
Execution Unit
ALU
SHIFTER
FIND ONE
Main Control
CTRL
3 Level
Instruction
Queue
clk
halti_n
reseti_n
reseto_n
halto_n
e
fc
addr
addrz
datao
datai
dataz
ctrlz
as_n
rw
lds_n
uds_n
dtack_n
br_n
bg_n
bgack_n
vma_n
vpa_n
berr_n
Data Buffer
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