IA186EM/IA188EM
Data Sheet
8-Bit/16-Bit Microcontrollers
February 25, 2011
a[19:0]
clkouta
clkoutb
ad[15:0]
Clock and Power
Management
ale
den_n
wr_n
Bus Interface
and Control
wlb_n
whb_n
rd_n
drq0
drq1
Direct Memory
Access
res_n
int4
int3/inta1_n/irq
int2/inta0_n
int1/select_n
int0
Peripheral
Control and
Registers
Interrupt
Controller
(
)
nmi
tmrin0
tmrout0
Timers
lcs_n/once0_n
mcs3_n/rfsh_n
ucs_n/once1_n
pcs5_n/a1
tmrin1
tmrout1
Chip Selects
and Control
txd0
rxd0
pcs6_n/a2
Asynchronous
Serial Port
mcs2_n–mcs0_n
pcs3_n–pcs0_n
cts0_n/enrx0_n
rts0_n/rtr0_n
sclk
sden0
Synchronous
Serial Port
Programmable
I/O
pio[31:0]
sden1
sdata
Instruction Decode
and Execution
Figure 7. Functional Block Diagram
Note: See pin descriptions for pins that share other functions with PIO pins.
Pins pwd, int5, int6, rts1_n/rtr1_n, and cts1_n/enrx1_n are multiplexed with
int2_n/inta0_n, drq0_n, drq0_n, pcs3_n, and pcs2_n, respectively.
®
IA211050831-19
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