Clear-Com PS-10K User Manual download pdf (Page 18)

18 Altera Corporation

AN 59: Conﬁguring FLEX 10K Devices

Table 9. Pin Functions (Part 1 of 2)

Pin Name User

Mode

Configuration

Scheme

Pin Type Description

MSEL0

MSEL1

– All Input 2-bit configuration input. Informs FLEX 10K device of the

configuration scheme. These bits are set as shown in

Table 3 earlier in this application note.

nSTATUS – All Bidirectional

open-drain

The FLEX 10K device drives nSTATUS low immediately

after power-up and releases it within 100 ms. The nSTATUS

pin must be pulled up to V

with a 1-kΩ resistor. If an error

occurs during configuration, nSTATUS is pulled low by the

FLEX 10K device. If an external source drives the nSTATUS

pin low (as in multi-device configuration), the FLEX 10K

device enters an error state.

nCONFIG – All Input Configuration control input. A low resets the FLEX 10K

device. A low-to-high transition begins configuration.

CONF_DONE – All Bidirectional

open drain

Status output. The CONF_DONE pin is driven low by the

FLEX 10K device during configuration. After all

configuration data has been received without errors, the

FLEX 10K device tri-states CONF_DONE.

Status input. A high on this input directs the FLEX 10K

device to initialize and enter user mode.

The CONF_DONE net must be pulled to V

with a 1.0-kΩ

resistor and may be driven low by an external source to

delay the initialization process.

DCLK – Configuration

EPROM,

PPS, PS

Input Clock input used to clock data from an external source into

the FLEX 10K device.

nCE – All Input Active-low Chip Enable. The nCE pin activates the device

with a low signal to allow configuration and should be tied

low for single device configuration.

nCEO – Multi-device Output Output that drives low when FLEX 10K configuration is

complete. This pin feeds the nCE of another FLEX 10K

device in a multi-device, cascaded configuration scheme.

nWS I/O PPA Input Write strobe input. A low-to-high transition causes the

FLEX 10K device to latch a byte of data on the

DATA[7..0] pins.

nRS I/O PPA Input Read strobe input. A low input directs the FLEX 10K device

to drive the RDYnBSY signal on the DATA7 pin. If the nRS pin

is not used, it should be tied high.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 24 25

Comments to this Manuals

No comments

Clear-Com PS-10K User Manual Page 18

Comments to this Manuals

Related products and manuals for Power supply units Clear-Com PS-10K