Rainbow-electronics AT17F080 Bedienungsanleitung PDF herunterladen (Seite 5)

AT17F040/080

3039C–CNFG–11/02

DATA Three-state DATA output for configuration. Open-collector bi-directional pin for

programming.

CLK Clock input. Used to increment the internal address and bit counter for reading and

programming.

PAGE_ EN Input used to enable page download mode. When PAGE_EN is high the configuration

download address space is partitioned into 4 equal pages. This gives users the ability to

easily store and retrieve multiple configuration bitstreams from a single configuration

device. This input works in conjunction with the PAGESEL inputs. PAGE_EN must be

held low if paging is not desired. When SER_EN is Low (ISP mode) this pin has no

effect.

PAGESEL[1:0] Page select inputs. Used to determine which of the 4 memory pages are targeted during

a serial configuration download. The address space for each of the pages is shown in

Table 2. When SER_EN is Low (ISP mode) these pins have no effect.

Pin Description

Name I/O

AT17F040 AT17F080

LAP

PLCC

LAP

PLCC

TQFP

DATAI/O1212240

CLK I2424543

PAGE_ENI–16–16139

PAGESEL0 I – 11 – 5 20 14

PAGESEL1 I – 7 – 7 25 19

RESET

/OEI36361913

I48482115

GND – 5 10 5 10 24 18

CEO

6 14 6 14 27 21

A2 I

READY O – 15 – 15 29 23

SER_EN

I7 17 7 174135

–8 20 8 204438

Table 2. Address Space

Paging Decodes AT17F040 (4 Mbits) AT17F080 (8 Mbits)

PAGESEL = 00, PAGE_EN = 1 00000 – 0FFFFh 00000 – 1FFFFh

PAGESEL = 01, PAGE_EN = 1 10000 – 1FFFFh 20000 – 3FFFFh

PAGESEL = 10, PAGE_EN = 1 20000 – 2FFFFh 40000 – 5FFFFh

PAGESEL = 11, PAGE_EN = 1 30000 – 3FFFFh 60000 – 7FFFFh

PAGESEL = XX, PAGE_EN = 0 00000 – 3FFFFh 00000 – 7FFFFh

1 2 3 4 5 6 7 8 9 10 ... 17 18

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