®
R8800
RISC DSP Communication
RDC
16-BIT RISC MICROCONTROLLER
2. Block Diagram
INT2/INTA0
INT1/SELECT
INT0 NMI
CLKOUTA
INT3/INTA1/IRQ
INT4
TMROUT0 TMROUT1
DRQ0
DRQ1
CLKOUTB
TMRIN0
TMRIN1
X2
X1
Interrupt
Control Unit
Timer Control
Unit
DMA
Unit
Clock and
Power
VCC
GND
Management
RST
LCS/ONCE0
MCS3/RFSH
Chip
Select
Unit
Instruction
Queue (64bits)
MCS2-MCS0
UCS/ONCE1
PCS3-PCS0
Instruction
Decoder
Micro
ROM
PSRAM
Control
Unit
PIO
Unit
PIO31~0
PCS5/A1
PCS6/A2
Control Signal
Register
File
General,
EA / LA
Address
Refresh
Control
Unit
Asynchro-
nous Serial
Port
Segment,
Eflag Register
ARDY
SRDY
S2~S0
DT/R
DEN
TXD
RXD
Bus
Interface
Unit
ALU
(Special,
Logic,
Adder,
BSF)
HOLD
HLDA
Execution
Unit
Synchronous
Serial Interface
S6/CLKDIV2
UZI
SCLK
SDATA
SDEN0 SDEN1
RD
WHB
WLB
A19~A0
AD15~AD0
WR
BHE/ADEN
ALE
Specifications subject to change without notice, contact your sales representatives for the most update information.
Page 3 of REV 1.0 Oct.26 2006
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