Cypress CY14B101Q2, CY14B101Q3, CY14B101Q1 manual NvSRAM Special Instructions, Software Store

CY14B101Q1

CY14B101Q2

PRELIMINARYCY14B101Q3

Figure 12. Burst Mode Read Instruction Timing

CS

SCK

SI

SO

0	1		2	3	4	5	6	7	0	1	2	3	4	5	6	7		20	21	22	23	0	1	2	3	4	5	6	7	0		7	0	1	2	3	4	5	6	7
																	~~														~
																														~
		Op-Code														17-bit Address
0	0	0	0		0	0	1	1	0	0	0	0	0	0	0	A16		A3	A2	A1	A0
									MSB							~~				LSB
																								Data Byte 1												Data Byte N
																						D7	D6 D5 D4			D3 D2		D1 D0		D7 D0			D7	D6	D5 D4		D3 D2		D1 D0
																					MSB							LSB		~~		MSB							LSB

CS

SCK

SI

SO

Figure 13. Write Instruction Timing

0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	20	21	22	23	0	1	2	3	4	5	6	7
															~~
			Op-Code												17-bit Address
0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	A16	A3	A2	A1	A0	D7	D6	D5	D4	D3	D2	D1	D0
								MSB							~ ~				LSB MSB					Data			LSB
													HI-Z

CS

SCK

SI

SO

Figure 14. Burst Mode Write Instruction Timing

0	1	2	3	4	5	6	7	0	1	2	3	4	5	6	7	20	21	22	23	0	1	2	3	4	5	6	7	0		7	0	1	2	3	4	5	6	7
															~~													~
																						Data Byte 1							~				Data Byte N
		Op-Code													17-bit Address													~~
															~ ~						D6 D5 D4											D6 D5		D4
0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	A16	A3	A2	A1 A0		D7				D3 D2		D1	D0 D7		D0		D7				D3 D2		D1	D0
								MSB											LSB MSB								LSB

HI-Z

nvSRAM Special Instructions

CY14B101Q1/CY14B101Q2/CY14B101Q3 provides four special instructions which enables access to four nvSRAM specific functions: STORE, RECALL, ASDISB, and ASENB. Table 8 lists these instructions.

Software STORE

When a STORE instruction is executed, nvSRAM performs a Software STORE operation. The STORE operation is issued irrespective of whether a write has taken place since last STORE or RECALL operation.

Document #: 001-50091 Rev. *A

Table 8. nvSRAM Special Instructions

Function Name	Opcode	Operation
STORE	0011 1100	Software STORE
RECALL	0110 0000	Software RECALL
ASENB	0101 1001	AutoStore Enable
ASDISB	0001 1001	AutoStore Disable

To issue this instruction, the device must be write enabled (WEN bit = ‘1’). The instruction is performed by transmitting the STORE opcode on the SI pin following the falling edge of CS. The WEN

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