CS49310 datasheet(83/90 Pages) CIRRUS

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CS49300 Family DSP

DS339F7

CLKSEL—DSP Clock Select: Pin 31

This pin selects the clock mode of the CS493XX. When CLKSEL is low, CLKIN is connected

to the internal PLL from which all internal clocks are derived. When CLKSEL is high CLKIN is

connected to the DSP clock. INPUT

DATA7, EMAD7, GPIO7—Pin 8

DATA6, EMAD6, GPIO6—Pin 9

DATA5, EMAD5, GPIO5—Pin 10

DATA4, EMAD4, GPIO4—Pin 11

DATA3, EMAD3, GPIO3—Pin 14

DATA2, EMAD2, GPIO2—Pin 15

DATA1, EMAD1, GPIO1—Pin 16

DATA0, EMAD0, GPIO0—Pin 17

In parallel host mode, these pins provide a bidirectional data bus. If a serial host mode is

selected, these pins can provide a multiplexed address and data bus for connecting an 8-bit

external memory. Otherwise, in serial host mode, these pins can act as general-purpose input

or output pins that can be individually configured and controlled by the DSP.

BIDIRECTIONAL - Default: INPUT

A0, SCCLK—Host Parallel Address Bit Zero or Serial Control Port Clock: Pin 7

In parallel host mode, this pin serves as one of two address input pins used to select one of

four parallel registers. In serial host mode, this pin serves as the serial control clock signal,

specifically as the SPI clock input or the I2C clock input. INPUT

A1, SCDIN—Host Address Bit One or SPI Serial Control Data Input: Pin 6

In parallel host mode, this pin serves as one of two address input pins used to select one of

four parallel registers. In SPI serial host mode, this pin serves as the data input. INPUT

RD, R/W, EMOE, GPIO11—Host Parallel Output Enable or Host Parallel R/W or External Memory

Output Enable or General Purpose Input & Output Number 11: Pin 5

In Intel parallel host mode, this pin serves as the active-low data bus enable input. In Motorola

parallel host mode, this pin serves as the read-high/write-low control input signal. In serial host

mode, this pin can serve as the external memory active-low data-enable output signal. Also in

serial host mode, this pin can serve as a general purpose input or output bit. At reset this pin

acts as one of the mode select pins. It requires a 3.3k Ohm pull-up or pull-down.

BIDIRECTIONAL - Default: INPUT

WR, DS, EMWR, GPIO10—Host Write Strobe or Host Data Strobe or External Memory Write

Enable or General Purpose Input & Output Number 10: Pin 4

In Intel parallel host mode, this pin serves as the active-low data-write-input strobe. In Motorola

parallel host mode, this pin serves as the active-low data-strobe-input signal. In serial host

mode, this pin can serve as the external-memory active-low write-enable output signal. Also in

serial host mode, this pin can serve as a general purpose input or output bit. At reset this pin

acts as one of the mode select pins. It requires a 3.3k Ohm pull-up or pull-down.

BIDIRECTIONAL - Default: INPUT

CS—Host Parallel Chip Select, Host Serial SPI Chip Select: Pin 18

In parallel host mode, this pin serves as the active-low chip-select input signal. In serial host

SPI mode, this pin is used as the active-low chip-select input signal. INPUT

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