Datasheet

AS4C16M32MD1
Confidential 17 Rev. 1.0/July 2014
6. COMMANDS
All commands (address and control signals) are registered on the positive edge of clock (crossing
of CK going high and CK going low). Figure 6 shows basic timing parameters for all commands.
Table 5, Table 6 and Table 7 provide a quick reference of available commands.
Table 8 and Table 9 provide the current state / next state information. This is followed by a verbal
description of each command.
Notes:
1. All states and sequences not shown are illegal or reserved.
2. DESELECT and NOP are functionally interchangeable.
3. Auto pre-charge is non-persistent. A10 High enables Auto pre-charge, while A10 Low disables Auto pre-
charge.
4. Burst Terminate applies to only Read bursts with Autoprecharge disabled. This command is undefined
and should not be used for Read with Auto pre-charge enabled, and for Write bursts.
5. This command is BURST TERMINATE if CKE is High and DEEP POWER DOWN entry if CKE is Low.
6. If A10 is low, bank address determines which bank is to be precharged. If A10 is high, all banks
are precharged and BA0~BA1 are don’t care.
7. This command is AUTO REFRESH if CKE is High and SELF REFRESH if CKE is low.
8. All address inputs and I/O are ‘don’t care’ except for CKE. Internal refresh counters control bank and row
addressing.
9. All banks must be precharged before issuing an AUTO-REFRESH or SELF REFRESH command.
10. BA0 and BA1 value select between MRS and EMRS.
11. CKE is HIGH for all commands shown except SELF REFRESH and DEEP POWER-DOWN.
Notes:
1. Used to mask write data, provided coincident with the corresponding data.