longpole001
- 24th July 2018, 09:26
Over the last 2 weeks been reading the 27k40 /47k40 datasheets
i was looking to design with the 47k40 with TQFN 44 package
I have found the Pin allocation table ( table 2 ) does not match the diagrams for each pin in either the TQFN / QFN packages ,
also the n/c pins are not shown in the Pin allocation table
working from the pin allocation table finds that pins 33,34 are not connected for 44 pin packages
have raised a case with microchip to check , but it will some time before its looked at
here are the following discrepancies between the pin allocation table and Figures 5,6 of the 44 pin packages , if i missed something please let me know
following are the discrepancies between the pin allocation table and the chip shown on FIG5, FIG6
N/C - FIG 5,6 = PIN 31
RA6 - PIN ALLOCATION - TABLE 2 = PIN 31,
RA6 - FIG 5,6 = PIN 33,
N/C - PIN ALLOCATION - TABLE 2 = PIN 33 ( pin not shown in table thus Must be N/C pin ),
RA7 - PIN ALLOCATION - TABLE 2 = PIN 30,
RA7 - FIG 5,6 = PIN 32
N/C - FIG 5,6 = PIN 8
RB0 - PIN ALLOCATION - TABLE 2 = PIN 8
RB0 - FIG 5,6 = PIN 9
RB1 - PIN ALLOCATION - TABLE 2 = PIN 9
RB1 - FIG 5,6 = PIN 10
RB2 - PIN ALLOCATION - TABLE 2 = PIN 10
RB2 - FIG 5,6 = PIN 11
RB3 - PIN ALLOCATION - TABLE 2 = PIN 11
RB3 - FIG 5,6 = PIN 12
RC0 - PIN ALLOCATION - TABLE 2 = PIN 32
RC0 - FIG 5,6 = PIN 34
N/C - PIN ALLOCATION - TABLE 2 = PIN 34 ( pin not shown in table thus Must be N/C pin )
RC1 - PIN ALLOCATION - TABLE 2 = PIN 32
RC1 - FIG 5,6 = PIN 35
RC2 - PIN ALLOCATION - TABLE 2 = PIN 32
RC2 - FIG 5,6 = PIN 35
RD0 - PIN ALLOCATION - TABLE 2 = PIN 38
RD0 - FIG 5,6 = PIN 39
RD1 - PIN ALLOCATION - TABLE 2 = PIN 39
RD1 - FIG 5,6 = PIN 38
i have attached the datasheet details for checking
87438744
874687478748
i was looking to design with the 47k40 with TQFN 44 package
I have found the Pin allocation table ( table 2 ) does not match the diagrams for each pin in either the TQFN / QFN packages ,
also the n/c pins are not shown in the Pin allocation table
working from the pin allocation table finds that pins 33,34 are not connected for 44 pin packages
have raised a case with microchip to check , but it will some time before its looked at
here are the following discrepancies between the pin allocation table and Figures 5,6 of the 44 pin packages , if i missed something please let me know
following are the discrepancies between the pin allocation table and the chip shown on FIG5, FIG6
N/C - FIG 5,6 = PIN 31
RA6 - PIN ALLOCATION - TABLE 2 = PIN 31,
RA6 - FIG 5,6 = PIN 33,
N/C - PIN ALLOCATION - TABLE 2 = PIN 33 ( pin not shown in table thus Must be N/C pin ),
RA7 - PIN ALLOCATION - TABLE 2 = PIN 30,
RA7 - FIG 5,6 = PIN 32
N/C - FIG 5,6 = PIN 8
RB0 - PIN ALLOCATION - TABLE 2 = PIN 8
RB0 - FIG 5,6 = PIN 9
RB1 - PIN ALLOCATION - TABLE 2 = PIN 9
RB1 - FIG 5,6 = PIN 10
RB2 - PIN ALLOCATION - TABLE 2 = PIN 10
RB2 - FIG 5,6 = PIN 11
RB3 - PIN ALLOCATION - TABLE 2 = PIN 11
RB3 - FIG 5,6 = PIN 12
RC0 - PIN ALLOCATION - TABLE 2 = PIN 32
RC0 - FIG 5,6 = PIN 34
N/C - PIN ALLOCATION - TABLE 2 = PIN 34 ( pin not shown in table thus Must be N/C pin )
RC1 - PIN ALLOCATION - TABLE 2 = PIN 32
RC1 - FIG 5,6 = PIN 35
RC2 - PIN ALLOCATION - TABLE 2 = PIN 32
RC2 - FIG 5,6 = PIN 35
RD0 - PIN ALLOCATION - TABLE 2 = PIN 38
RD0 - FIG 5,6 = PIN 39
RD1 - PIN ALLOCATION - TABLE 2 = PIN 39
RD1 - FIG 5,6 = PIN 38
i have attached the datasheet details for checking
87438744
874687478748