USB2229-NU-02 Standard Microsystems (SMSC), USB2229-NU-02 Datasheet - Page 18

• Manufacturer Part Number: USB2229-NU-02
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2229-NU-02

• Operating Supply Voltage (typ): 1.8/3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

Revision 1.4 (09-14-07)
Memory Address
General Purpose
General Purpose
General Purpose
General Purpose
General Purpose
Memory Write
Memory Read
Memory Chip
Enable
NAME
Strobe
Strobe
Bus
I/O
I/O
I/O
I/O
I/O
MA[1:0]/CLK_S
SYMBOL
EL[1:0]
nMWR
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
nMRD
nMCE
Table 6.1 USB2229/USB2230 Pin Descriptions
5th Generation Hi-Speed USB Flash Media and IrDA Controller with Integrated Card Power FETs
BUFFER
I/O8PD
TYPE
I/O8
I/O8
I/O8
I/O8
I/O8
O8
O8
O8
DATASHEET
MISC
18
MA[1:0], These signals address memory locations
within the external memory.
SEL[1:0]. During nRESET assertion, these pins will
select the operating frequency of the external clock, and
the corresponding weak pull-down resistors are
enabled. When nRESET is negated, the value on these
pins will be internal latched and these pins will revert to
MA[1:0] functionality, the internal pull-downs will be
disabled.
SEL[1:0] = ‘00’. 24MHz
SEL[1:0] = ‘01’. RESERVED
SEL[1:0] = ‘10’. RESERVED
SEL[1:0] = ‘11’. 48MHz
Note:
1. IDLE bit (PCON.0) is 1.
2. INT2 is negated
3. SLEEP bit of CLOCK_SEL is 1.
If the latched value is ‘0’, then the corresponding MA pin
will function identically to the MA[15:3] pins at all times
(other than during nRESET assertion).
Program Memory Write; active low
Program Memory Read; active low
Program Memory Chip Enable; active low.
This signal is asserted, when any of the following
conditions are no longer met:
1. IDLE bit (PCON.0) is 1.
2. INT2 is negated
3. SLEEP bit of CLOCK_SEL is 1.
Note:
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin may be used either as input, edge sensitive
interrupt input, or output.
This pin may be used either as input, edge sensitive
interrupt input, or output.
If the latched value is ‘1’, then the
corresponding MA pin is tri-stated when the
following conditions are true:
This signal is held to a logic ‘high’ while
nRESET is asserted.
DESCRIPTION
SMSC USB2229/USB2230
Datasheet