topic Re: pcf8563 register value is different with a data sheet in LPC Microcontrollers

pcf8563 register value is different with a data sheet

hyeongjinkim — Mon, 12 Jul 2021 02:31:04 GMT

PCF8563

Now we just check and compare with a PCF8563 data sheet and real register value.

but our real 01h value and a data sheet value is different

our register value

01h - 0x80 , 0xC0

on data sheet

01h - N (0x00)

we compare with a TABLE 4. Formatted registers overview

can you check that problem please?

guoweisun — Wed, 14 Jul 2021 01:36:45 GMT

what is about the result after your read others registers?

Only this 0X01 has read error?

hyeongjinkim — Thu, 15 Jul 2021 00:27:39 GMT

thank you for replying

reset value 01h real value and 01h data sheet value is different does it make any problem? or error?

PCF8563 Reset value

guoweisun — Thu, 15 Jul 2021 03:22:07 GMT

Do you mean different lots have different default value of 0X01 register?

hyeongjinkim — Thu, 15 Jul 2021 04:16:41 GMT

Thank you for replying

other reset register value is same all right but 01h reset register value is different with a data sheet

Table 27. Register reset value[1]

01h Control_status_2 0 0 0 0 0 0 0 0

hyeongjinkim — Thu, 15 Jul 2021 04:19:20 GMT

Thank you for replying

other reset register value is same as data sheet ,but 01h reset register value is different with a data sheet

Table 27. Register reset value[1]

01h Control_status_2 0 0 0 0 0 0 0 0

guoweisun — Thu, 15 Jul 2021 06:23:12 GMT

can you catch the waveform using oscilloscope to show each bit value for your read command?

hyeongjinkim — Mon, 19 Jul 2021 08:48:25 GMT

thank you for your replying

i will check that value and waveform , if chips make problem again i will posting again thank you