USE ULTRA37000™ FOR
ALL NEW DESIGNS
CY7C371i
Document #: 38-03032 Rev. *A
Page 3 of 12
compatible with 5.0V systems. When VCCIO pins are
connected to a 3.3V source, the input voltage levels are
compatible with both 5.0V and 3.3V systems, while the output
voltage levels are compatible with 3.3V systems. There will be
an additional timing delay on all output buffers when operating
in 3.3V I/O mode. The added flexibility of 3.3V I/O capability
is available in commercial and industrial temperature ranges.
Bus Hold Capabilities on all I/Os and Dedicated Inputs
In addition to ISR capability, a new feature called bus-hold has
been added to all FLASH370i I/Os and dedicated input pins.
Bus-hold, which is an improved version of the popular internal
pull-up resistor, is a weak latch connected to the pin that does
not degrade the device’s performance. As a latch, bus-hold
recalls the last state of a pin when it is three-stated, thus
reducing system noise in bus-interface applications. Bus-hold
additionally allows unused device pins to remain unconnected
on the board, which is particularly useful during prototyping as
designers can route new signals to the device without cutting
trace connections to VCC or GND.
Design Tools
Development software for the CY7C371i is available from
Cypress’s Warp™, Warp Professional™, and Warp Enter-
prise™ software packages. Please refer to the data sheets on
these products for more details. Cypress also actively
supports almost all third-party design tools. Please refer to
third-party tool support for further information.
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