R

EM6607

Copyright © 2005, EM Microelectronic-Marin SA

31

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15 Metal Mask Options

The following options can be selected at the time of programming the metal mask ROM.

Table 46. input/output Ports

Pull-Down

Yes / No

Strong / Weak

Pull-Up

Yes / No

Strong / Weak

Nch-open drain

Yes / No

Input blocked

when Output

Yes / No

Output Hi-Z in

SLEEP mode

Yes / No

0

3

4

OEBsleepRes

Bit in Option2

register.

Yes =1, No=0

OECsleepRes

Bit in Option2

register.

Yes =1, No=0

OEDsleepRes

Bit in Option2

register.

Yes =1, No=0

Put one letter (Y, N) in each BOX from proposed for the column.

For Pull-Up/Down if “Y” add also one letter (S,W) to define type of resistor. (see

138H

18.5 electrical parameters also)

*1 When used as N-channel Open drain output not-controlled Pull-Up (Y-SOD) can be used. Pull Up active during Output also

if Y-S is set in Pull-Up & Y for Nch-open drain an external resistor is needed to make output High !!!! because Pull Up is active

during input only ! This is applicable only for Ports B,C,D and E which can be outputs also.

*2 Port-wise for PortC and PortD (one possibility for the whole port); PortB bit-wise

Table 47. PortB Hi Current Drive capability

Possible options are

Possible options are

B0

PB0 output

B1

PB1 output

B2

PB2 output

B3

PB3 output

Put in each box one of 3 possibilities mentioned in the title of column like 18n, 24p (strongest configuration). Numbers

above state for number of active N and P transistors in output buffer. See electrical parameters to know what to expect at

terminals can switch at the same time in strongest configuration to limit the spikes generated by switching.