YW80C188EC20 Intel, YW80C188EC20 Datasheet - Page 10

• Manufacturer Part Number: YW80C188EC20
• Description: IC MPU 16-BIT 5V 20MHZ 100-SQFP
• Manufacturer: Intel

Specifications of YW80C188EC20

• Processor Type: 80C188
• Features: EC suffix, 16-Bit, Extended Temp
• Speed: 20MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 100-SQFP
• Family Name: Intel186
• Device Core: 8088
• Device Core Size: 16b
• Frequency (max): 20MHz
• Supply Voltage 1 (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 100
• Package Type: SQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 864139

80C186EC 188EC 80L186EC 188EC
NOTE
Pin names in parentheses apply to the 80C188EC 80L188EC
10
V
V
CLKIN
OSCOUT
CLKOUT
RESIN
RESOUT
PDTMR
NMI
TEST BUSY
(TEST)
A19 S6 ONCE
CC
SS
Pin Name
Type
Pin
I O
I O
G
O
O
O
P
I
I
I
I
Input
Type
A(E)
A(L)
A(L)
A(E)
A(E)
A(L)
Output
States
H(WH)
R(WH)
P(WH)
I(WH)
H(Q)
R(Q)
H(Q)
R(Q)
R(Z)
H(Z)
P(X)
P(X)
H(0)
R(1)
P(0)
P(0)
I(Q)
I(Q)
I(0)
I(0)
Table 2 Pin Descriptions
POWER
GROUND
CLocK INput is the external clock input An external
oscillator operating at two times the required processor
operating frequency can be connected to CLKIN For
crystal operation CLKIN (along with OSCOUT) are the
crystal connections to an internal Pierce oscillator
OSCillator OUTput is only used when using a crystal to
generate the internal clock OSCOUT (along with CLKIN)
are the crystal connections to an internal Pierce oscillator
This pin can not be used as 2X clock output for non-
crystal applications (i e this pin is not connected for non-
crystal applications)
CLocK OUTput provides a timing reference for inputs and
outputs of the processor and is one-half the input clock
(CLKIN) frequency CLKOUT has a 50% duty cycle and
transitions every falling edge of CLKIN
RESet IN causes the processor to immediately terminate
any bus cycle in progress and assume an initialized state
All pins will be driven to a known state and RESOUT will
also be driven active The rising edge (low-to-high)
transition synchronizes CLKOUT with CLKIN before the
processor begins fetching opcodes at memory location
0FFFF0H
RESet OUTput that indicates the processor is currently in
the reset state RESOUT will remain active as long as
RESIN remains active
Power-Down TiMeR pin (normally connected to an
external capacitor) that determines the amount of time the
processors waits after an exit from Powerdown before
resuming normal operation The duration of time required
will depend on the startup characteristics of the crystal
oscillator
Non-Maskable Interrupt input causes a TYPE-2 interrupt
to be serviced by the CPU NMI is latched internally
TEST is used during the execution of the WAIT instruction
to suspend CPU operation until the pin is sampled active
(LOW) TEST is alternately known as BUSY when
interfacing with an 80C187 numerics coprocessor
(80C186EC only)
This pin drives address bit 19 during the address phase of
the bus cycle During T2 and T3 this pin functions as
status bit 6 S6 is low to indicate CPU bus cycles and high
to indicate DMA or refresh bus cycles During a processor
reset (RESIN active) this pin becomes the ONCE input
pin Holding this pin low during reset will force the part into
ONCE Mode
a
5V
g
10% power supply connection
Pin Description