M34286 datasheet(21/66 Pages) RENESAS

21 / 66 page

Rev.1.00

Aug 06, 2008

page 21 of 64

REJ03B0251-0100

4286 Group

Remarks

Only key-on wakeup function of the port whose pull-down transistor is

turned ON by register PU1 and PU2 are valid.

Only key-on wakeup function of the port whose pull-down transistor is

turned ON by register PU0 is valid.

Key-on wakeup function is always valid.

Return source

Ports D0–D7

Ports E0, E1, G

Port E2

Return condition

Return by an external “H” level

input.

Return by an external “H” level

input.

Return by an external “H” level

input.

Table 8 Return source and return condition

(5) Pull-down control register

Registers PU0, PU1, and PU2 are 4-bit registers and control

the ON/OFF of pull-down transistor and key-on wakeup

function for ports E0, E1, G and ports D0–D7.

Table 9 Pull-down control registers

PU03

PU02

PU01

PU00

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Ports G2, G3 pull-down transistor control

bit

Ports G0, G1 pull-down transistor control

bit

Port E1 pull-down transistor control bit

Port E0 pull-down transistor control bit

Pull-down control register PU0

at reset : 00002

at RAM back-up : state retained

Note: “W” represents write enabled.

Set the contents of register PU0, PU1, or PU2 through register

A with the TPU0A, TPU1A, or TPU2A instruction, respectively.

(4) Return signal

An external wakeup signal is used to return from the RAM

back-up mode. Table 8 shows the return condition for each

return source.

PU13

PU12

PU11

PU10

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Port D7 pull-down transistor control bit

Port D6 pull-down transistor control bit

Port D5 pull-down transistor control bit

Port D4 pull-down transistor control bit

Pull-down control register PU1

at reset : 00002

at RAM back-up : state retained

PU23

PU22

PU21

PU20

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Pull-down transistor OFF, key-on wakeup invalid

Pull-down transistor ON, key-on wakeup valid

Port D3 pull-down transistor control bit

Port D2 pull-down transistor control bit

Port D1 pull-down transistor control bit

Port D0 pull-down transistor control bit

Pull-down control register PU2

at reset : 00002

at RAM back-up : state retained

M34286 датащи(PDF) 21 Page - Renesas Technology Corp

M34286 датащи(HTML) 21 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66

датащи скачать

ссылки URL