Rainbow Electronics AT17F080 - Manual (Page 5)

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
8
LAP
20
PLCC
8
LAP
20
PLCC
44
PLCC
44
TQFP
DATA I/O 1 2 1 2 2 40
CLK I 2 4 2 4 5 43
PAGE_EN I – 16 – 16 1 39
PAGESEL0 I – 11 – 5 20 14
PAGESEL1 I – 7 – 7 25 19
RESET/OE I 3 6 3 6 19 13
CE I 4 8 4 8 21 15
GND – 5 10 5 10 24 18
CEO O
6 14 6 14 27 21
A2 I
READY O – 15 – 15 29 23
SER_EN I 7 17 7 17 41 35
V
CC
– 8 20 8 20 44 38
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