PCF8833USLASH2DA datasheet(90/112 Pages) PHILIPS

90 / 112 page

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Table 97 Sequence to program OTP cells

STEP

D/C

COMMAND BYTE(1)

ADDR

DESCRIPTION

654321

set VOTP(gate) =0V; VOTP(drain) =0V

000000

reset (may also be hardware reset)

wait 1 ms for refresh to take effect

set VOTP(gate) =8V; VOTP(drain) =8V

111000

enter CALMM mode

ORA = 000; OPE = 0; CALMM = 1

111000

send OTPSHTIN; note 2

shift15

PVB3

PVB2

PVB1

PVB0

BRS

TRS

set PVB[3:0]; BRS and TRS

shift14

FVB3

FVB2

FVB1

FVB0

VCBW

EFD

set FVB[3:0]; VCBW and EFD; note 3

shift0

MMVOP5 MMVOP4 MMVOP3 MMVOP2 MMVOP1 MMVOP0

set MMVOP[5:0] and SEAL = 0

111000

select row 0 in OTP matrix

ORA = 000; OPE = 0; CALMM = 1

111000

enable programming

ORA = 000; OPE = 1; CALMM = 1

wait for 50 ms until OTP cells are

programmed

111000

disable programming

ORA = 000; OPE = 0; CALMM = 1

111000

select row 1 in OTP matrix

ORA = 001; OPE = 0; CALMM = 1

111000

enable programming

ORA = 001; OPE = 1; CALMM = 1

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