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TMS320 SECOND-GENERATION
DEVICES
SPRS010B — MAY 1987 — REVISED NOVEMBER 1990
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77001
6
functional block diagram (TMS320C2x)
Data Bus
Data Bus
16
16
16
16
16
16
Shifters (0-7)
†
ACCL(16)
32
ACCH(16)
32
32
ALU(32)
32
32
32
Shifter(-6, 0, 1, 4)
16
Shifter(0-16)
7 LSB
From IR
9
9
16
16
16
32
TR(16)
16
Multiplier
PR(32)
DATA/PROG
RAM (256
× 16)
Block B0
16
16
16
16
16
Data RAM
Block B1
(256
× 16)
Block B2
(32
× 16)
3
ARB(3)
3
3
3
ARP(3)
ARAU(16)
AR4(16)
AR3(16)
AR2(16)
AR1(16)
16
AR0(16)
DP(9)
16
FSX
CLKX
DX
FSR
CLKR
DRR(16)
DXR(16)
PRD(16)
TIM(16)
IMR(6)
GREG(8)
16 16
IFR(6)
RPTC(8)
STO(16)
ST1(16)
IR(16)
3
16
16
16
16
16
D15-D0
16
16
16
16
A15-A0
INT(2-0)
MP/MC
Instruction
(8 x 16)
16
16
16
16
16
16 16 16
16
Stack
PC(16)
16
IACK
RS
BIO
MSC
HOLDA
HOLD
XF
BR
STRB
R/W
Program Bus
Program Bus
Program
ROM/
EPROM
(4096
× 16)
QIR(16)
16
16
16
6
8
16
16
16
X1
X2/CLKIN
CLKOUT1
CLKOUT2
Controller
16
PFC(16)
MCS(16)
PS
DS
IS
SYNC
MUX
MUX
MUX
MUX
MUX
MUX
MUX
DR
MUXMUX
C
READY
Address
AR5(16)
AR6(16)
AR7(16)
RSR(16)
XSR(16)
LEGEND:
ACCH = Accumulator high IFR = Interrupt flag register PC = Program counter
ACCL = Accumulator low IMR = Interrupt mask register PFC = Prefetch counter
ALU = Arithmetic logic unit IR = Instruction register RPTC = Repeat instruction counter
ARAU = Auxiliary register arithmetic unitMCS = Microcall stack GREG = Global memory allocation register
ARB = Auxiliary register pointer buffer QIR = Queue instruction register RSR = Serial port receive shift register
ARP = Auxiliary register pointer PR = Product register XSR = Serial port transmit shift register
DP = Data memory page pointer PRD = Period register for timer AR0-AR7 = Auxiliary registers
DRR = Serial port data receive registerTIM = Timer ST0, ST1 = Status registers
DXR = Serial port data transmit register TR = Temporary register C = Carry bit