20-668-0003 Rabbit Semiconductor, 20-668-0003 Datasheet - Page 29

• Manufacturer Part Number: 20-668-0003
• Description: IC CPU RABBIT2000 30MHZ 100PQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0003

• Processor Type: Rabbit 2000 8-Bit
• Speed: 30MHz
• Voltage: 2.7V, 3V, 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 100-MQFP, 100-PQFP
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 30 MHz
• Operating Supply Voltage: 0 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 40
• Number Of Timers: 8 & 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 20-668-0003; 316-1062

• Input/output instructions are now accomplished by normal memory access instructions
Some Z80 and Z180 instructions have been deleted and are not supported by the Rabbit
(see Chapter 19, “Differences Rabbit vs. Z80/Z180 Instructions,”). Most of the deleted
instructions are obsolete or are little-used instructions that can be emulated by several
Rabbit instructions. It was necessary to remove some instructions to free up 1-byte op
codes needed to implement new instructions efficiently. The instructions were not re-
implemented as 2-byte op codes so as not to waste on-chip resources on unimportant
instructions. Except for the instruction
op codes is retained for all Z180 instructions that are retained.
3.3.1 Load Immediate Data To a Register
A constant that follows the op code in the instruction stream can generally be loaded to
any register, except PC, AF, IP and F. (Load to the PC is a jump instruction.) This includes
the alternate registers on the Rabbit, but not on the Z180. Some example instructions
appear below.
Byte loads require four clocks, word loads require six clocks. Loads to IX, IY or the alter-
nate registers generally require two extra clocks because the op code has a 1-byte prefix.
3.3.2 Load or Store Data from or to a Constant Address
Similar 16-bit loads and stores exist for DE, BC, SP, IX and IY.
It is possible to load data to the alternate registers, but it is not possible to store the data in
the alternate register directly to memory.
Chapter 3 Details on Rabbit Microprocessor Features
prefixed by an op code byte to indicate access to an I/O space. There are two I/O
spaces, internal peripherals and external I/O devices.
LD A,3
LD HL,456
LD BC',3567
LD H',0x4A
LD IX,1234
LD C,54
LD A,(mn)
LD A',(mn)
LD (mn),A
LD HL,(mn)
LD HL',(mn)
LD (mn),HL
LD A',(mn)
** LD (mn),D'
** LD (mn),DE' ; **** not a legal instruction!
; not possible on Z180
; not possible on Z180
; loads 8 bits from address mn
; not possible on Z180
; load 16 bits from the address specified by mn
; to alternate register, not possible Z180
; allowed
; **** not a legal instruction!
EX (SP),HL
, the original Z180 binary encoding of
23