668-0003-C Rabbit Semiconductor, 668-0003-C Datasheet - Page 19

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

Specifications of 668-0003-C

• Rohs Status: RoHS non-compliant
• 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
• Features: -
• Other names: 316-1004; 668-0003

3.1 Processor Registers
The Rabbit’s registers are nearly identical to those of the Z180 or the Z80. The figure
below shows the register layout. The XPC and IP registers are new. The EIR register is the
same as the Z80 I register, and is used to point to a table of interrupt vectors for the exter-
nally generated interrupts. The IIR register occupies the same logical position in the
instruction set as the Z80 R register, but its function is to point to an interrupt vector table
for internally generated interrupts.
Chapter 3 Details on Rabbit Microprocessor Features
Bits marked "x" are read/write.
S-sign, Z-zero, V-overflow, C-carry
Alternate Registers
S Z
D
B
D '
B '
A
H
A '
H '
F - flag register layout
x x
C
E
C '
E '
L
L '
F
F '
x
M
V
8 / 16 bit
registers
ICROPROCESSOR
x
Figure 3-1. Rabbit Registers
C
3. D
IX
PC
IY
SP
XPC
A- 8-bit accumulator
F - flags register
HL- 16-bit accumulator
IX, IY - Index registers/alt accum’s
SP - stack pointer
PC- program counter
XPC - extension of program counter
IIR - internal interrupt register
EIR-external interrupt register
IP - interrupt priority register
ETAILS ON
F
EATURES
EIR
IIR
IP
R
ABBIT
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