Maxim Integrated 71M6521BE Energy Meter IC Family Software - Manual (Page 118)

71M652X Software User’s Guide
Revision 1.7 TERIDIAN Proprietary 118 of 138
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
6.3.1 Block Diagram
tf1, ie1 tf0, ie0
cycle instr
cycle fetch instr
cycle fetch instr
PORTS
p0
p1
p2
p3
port0i
port2i
port3i
port0o
port1o
port2o
port3o
SERIAL_0
s0con
s0buf s0rell s0relh
rxd0i
rxd0o
txd0
SERIAL_1
s1con
s1buf s1rell s1relh
rxd1i
txd1
ie0
ie1
ie2
ircon
ip1
ip0
int2
int3
int4
int5
int6
WATCHDOG_TIMER
wdtrel
swd
instrreg
acc b psw
sp
CLOCK_CONTROL
pcon ckcon
MEMORY_CONTROL
pc
dptr
TIMER_0_1
tl0
tl1
th0
th1
tcon
tmod
t1
t0
int0
int1
in
ter
n
al
s
frb
us
ISR
CONTROL_UNIT
ALU
RAM_SFR_CONTROL
dptr1
to/from
IRAM
&
SFRs
to/from
XRAMs
&
Prog
Mem
port1i
Figure 6-2: 80515 µC Block Diagram
DIO gating
registers
(DIO_R)
0
DIO pins
“external”
interrupts