AT90USB646 datasheet(82/456 Pages) ATMEL

82 / 456 page

7593L–AVR–09/12

AT90USB64/128

11.3.4

Alternate functions of Port C

The Port C alternate function is as follows:

Table 11-10 and Table 11-11 on page 83 relate the alternate functions of Port C to the overriding

signals shown in Figure 11-5 on page 76.

Table 11-9.

Port C pins alternate functions.

Port pin

Alternate function

PC7

A15/IC.3/CLKO(External Memory interface address bit 15 or Input Capture Timer 3 or CLKO

(Divided System Clock)

PC6

A14/OC.3A(External Memory interface address bit 14 or Output Compare and PWM output

A for Timer/Counter3)

PC5

A13/OC.3B(External Memory interface address bit 13 or Output Compare and PWM output

B for Timer/Counter3)

PC4

A12/OC.3C(External Memory interface address bit 12 or Output Compare and PWM output

C for Timer/Counter3)

PC3

A11/T.3(External Memory interface address bit 11or Timer/Counter3 Clok Input)

PC2

A10(External Memory interface address bit 10)

PC1

A9(External Memory interface address bit 9)

PC0

A8(External Memory interface address bit 8)

Table 11-10. Overriding signals for alternate functions in PC7..PC4.

Signal

name

PC7/A15/IC.3/CLKO

PC6/A14/OC.3A

PC5/A13/OC.3B

PC4/A12/OC.3C

PUOE

SRE • (XMM<1)

SRE •

(XMM<2)|OC3A

enable

SRE •

(XMM<3)|OC3B

enable

SRE •

(XMM<4)|OC3C

enable

PUOV

000

DDOE

SRE • (XMM<1)

SRE • (XMM<2)

SRE • (XMM<3)

SRE • (XMM<4)

DDOV

PVOE

SRE • (XMM<1)

SRE • (XMM<2)

SRE • (XMM<3)

SRE • (XMM<4)

PVOV

A15

if (SRE.XMM<2)

then A14

else OC3A

if (SRE.XMM<2)

then A13

else OC3B

if (SRE.XMM<2)

then A12

else OC3C

DIEOE

000

DIEOV

000

ICP3 input

–

AIO

–

–––

AT90USB646 Datasheet(PDF) 82 Page - ATMEL Corporation

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