R8821 RDC [RDC Semiconductor], R8821 Datasheet - Page 3

• Manufacturer Part Number: R8821
• Description: 16-BIT RISC MICROCONTROLLER
• Manufacturer: RDC [RDC Semiconductor]

R
2.
Specifications subject to change without notice, contact your sales representatives for the most update information.
R
LCS_n/ONCE0_n/RAS0_n
Block Diagram
D
D
UCS_n/ONCE1_n
MCS1_n/UCAS_n
MCS2_n/LCAS_n
MCS3_n/RAS1_n
S6/CLKDIV2_n
S2_n/BWSEL
S1_n~S0_n
PCS5_n/A1
PCS6_n/A2
A[19:0](MA[8:0])
C
C
DT/R_n
MCS0_n
RST_n
DEN_n
UZI_n
ARDY
SRDY
HOLD
HLDA
VCC
GND
®
®
AD[15:0]
R
R
I
I
S
S
X1
C
C
D
D
Management
Select
ALE
S
S
Interface
Clock and
P
P
Chip
Unit
Control
Refresh
Control
C
C
Power
DRAM
Unit
Unit
Unit
BHE_n/ADEN_n
o
o
Bus
X2
m
m
CLKOUTA
m
m
u
u
WR_n
n
n
i
i
c
c
CLKOUTB INT6-INT4
a
a
WLB_n
t
t
i
i
o
o
n
n
WHB_n
INT3/INTA1_n/IRQ
RD_n
INT2/INTA0_n
Eflag Register
Control Unit
Queue (64bits)
Interrupt
Register
General,
Segment,
Instruction
Instruction
(Special,
File
Logic,
Adder,
Decoder
ALU
BSF)
INT1/SELECT_n
INT0
Control Signal
NMI
Page 3 of 5
TMRIN0
Timer Control
TMROUT0
16-BIT RISC MICROCONTROLLER
Execution
Unit
Micro
EA / LA
Address
TMRIN1
ROM
Unit
TMROUT1
DRQ0
nous Serial
nous Serial
Unit
Asynchro-
Asynchro-
DMA
REV 1.0 Jul.11 2006
Port0
Port1
Unit
DRQ1
PIO
R8821
TXD0
RXD0
TXD1
RXD1
RTS0_n/RTR0_n
CTS0_n/ENRX0_n
RTS1_n/RTR1_n
CTS1_n/ENRX1_n
PIO[31:0]