Yes, it is possible to GANG the HSB pin of multiple CY14B108XX parts and use a single controller IOs to control it. You might be aware that HSB has an internal weak pull up resisitor of ~50K on these parts, therefore putting 8 devices in parallel will bring down the equivalent resistnace below 6.5K. Hence an external pull up of 10K is really not required on HSB in this scheme. However, even if you apply an external pull up of 10K with 8 devices gangegd for HSB , its not going to pose any issue as it will only reduce the effective resistance further below 4K.
Hope this helps.
I reopen my case because of changes in the AN43380.
The output HSB is an open drain, active low driver and allows multiple HSB pins to be tied together and controlled by a single controller I/O pin in a system.
Removed the description on connecting pins of multiple nvSRAM devices together (ganging of the pins).
I need a comments from Cypress.
Is it still possible “multiple HSB pins to be tied together and controlled by a single controller I/O pin in a system” or it is wrong information?