CYDM064B16 datasheet(9/27 Pages) CYPRESS

9 / 27 page

CYDM064B16

CYDM128B16

CYDM256B16

Document #: 001-00217 Rev. *H

Page 9 of 27

Table 4. Input Read Register Operation[12, 15]

SFEN

R/W

ADDR

IO0–IO1

IO2–IO15

Mode

x0000-Max VALID[13] VALID[13] Standard Memory Access

x0000

VALID[14]

IRR Read

Table 5. Output Drive Register [16]

SFEN

R/W

ADDR

IO0–IO4

IO5–IO15

Mode

X[17]

L[13]

x0000-Max VALID[13] VALID[13] Standard Memory Access

x0001

VALID[14]

ODR Write[16, 18]

x0001

VALID[14]

ODR Read[16]

Notes

12. SFEN = VIL for IRR reads

13. UB or LB = VIL. If LB = VIL, then DQ<7:0> are valid. If UB = VIL then DQ<15:8> are valid.

14. LB must be active (LB = VIL) for these bits to be valid.

15. SFEN active when either CEL = VIL or CER = VIL. It is inactive when CEL = CER = VIH.

16. SFEN = VIL for ODR reads and writes.

17. Output enable must be low (OE = VIL) during reads for valid data to be output.

18. During ODR writes data are also written to the memory.

Table 6. Semaphore Operation Example

Function

IO0–IO15 Left

IO0–IO15 Right

Status

No action

Semaphore free

Left port writes 0 to semaphore

Left Port has semaphore token

Right port writes 0 to semaphore

No change. Right side has no write access

to semaphore.

Left port writes 1 to semaphore

Right port obtains semaphore token

Left port writes 0 to semaphore

No change. Left port has no write access

to semaphore.

Right port writes 1 to semaphore

Left port obtains semaphore token

Left port writes 1 to semaphore

Semaphore free

Right port writes 0 to semaphore

Right port has semaphore token

Right port writes 1 to semaphore

Semaphore free

Left port writes 0 to semaphore

Left port has semaphore token

Left port writes 1 to semaphore

Semaphore free

[+] Feedback

CYDM064B16 Datasheet(PDF) 9 Page - Cypress Semiconductor

CYDM064B16 Datasheet(HTML) 9 Page - Cypress Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27

Datasheet Download

Link URL