Cypress CY8C29x66, AN2309, CY8C24794 specifications Two-Cell Battery Charger Firmware Flowchart Part

									AN2309
		Figure 9. Two-Cell Battery Charger Firmware Flowchart Part 1
Start
Init Device
Set Initialization
State
Send Debug Data
Measure Vb1, Vb2,
Ich, Tb
Calc Vbmin, Vbmax
State is not	Yes	Check For	Yes	Check For	Yes	Set Wait For
Error or				Discharge Stop
Wait For		Negative Ich				Temperature State
				Temperature
Temperature
No		No		No
				Check Full	Yes	Set Full Discharge
				Discharge
						State
				Condition
				No		Set Full Discharge
						State
		Check for	Yes	Set Wait For
		charge stop
				Temperature state
		temperature
		No
Check For	Yes	Set Error State
Voltage Error
		And Error Code
Vbmax>=VMAX
No
Check For	Yes	Set Error State
Current Error
		And Error Code
Ich>=IMAX
No
State	Yes	Set Activation		Charge On
Initialization				Start tACT, tCH, Timing
		State
				Open LOAD Out
No
State	Yes	Set Ireg=IACT;		Check For	Yes	Set Error State
Activation
		Regulate		Timeouts		And Error Code
No				No
				Check Cell	Yes	Cell Balancing
				Balancing
				Interval
				No
				Check Rapid	Yes	Set Rapid State	Start tRAP Time
				Start Condition
								Counter
				Vbmin>=VRS
				No
State	Yes	Set Ireg=IRAP;		Check For	Yes	Set Error State
Rapid		Vreg=VRAP;
				Timeouts		And Error Code
		Regulate
No				No
				Check Cell	Yes	Cell Balancing
				Balancing
				Interval
				No
				Check Charge	Yes	Set Charge
				Terminate
						Complete State
				Condition
				No
1									2
November 25, 2007				Document No. 001-17394 Rev. *B					- 13 -

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