MSM80C154S/83C154S/85C154HVS

Table 4-27 CPU pin details (ALF=1) in hard power down mode (HPD)

Name

Internal ROM

External ROM

P1.0/T2

Floating

Floating

 

 

 

P1.1/T2EX

Floating

Floating

 

 

 

P1.2

Floating

Floating

 

 

 

P1.3

Floating

Floating

 

 

 

P1.4

Floating

Floating

 

 

 

P1.5

Floating

Floating

 

 

 

P1.6

Floating

Floating

 

 

 

P1.7

Floating

Floating

 

 

 

RESET

“0” level input

“0” level input

 

 

 

P3.0/RXD

Floating

Floating

 

 

 

P3.1/TXD

Floating

Floating

 

 

 

P3.2/ INT0

External data input

External data input

 

 

 

P3.3/ INT1

External data input

External data input

 

 

 

P3.4/ T0

External data input

External data input

 

 

 

P3.5/ T1/HPDI

“0” level input

“0” level input

 

 

 

P3.6/ WR

Floating

Floating

 

 

 

P3.7/ RD

Floating

Floating

 

 

 

XTAL 2

Oscillator operative

Oscillator operative

 

 

 

XTAL 1

Oscillator operative

Oscillator operative

 

 

 

VSS

0 [V]

0 [V]

 

 

 

P2.0

Floating

Floating

P2.1

Floating

Floating

 

 

 

P2.2

Floating

Floating

 

 

 

P2.3

Floating

Floating

 

 

 

P2.4

Floating

Floating

 

 

 

P2.5

Floating

Floating

 

 

 

P2.6

Floating

Floating

 

 

 

P2.7

Floating

Floating

 

 

 

PSEN

“0” level output

“0” level output

 

 

 

ALE

“0” level output

“0” level output

 

 

 

EA

“1” level input

“0” level input

 

 

 

P0.7

Floating

Floating

 

 

 

P0.6

Floating

Floating

 

 

 

P0.5

Floating

Floating

 

 

 

P0.4

Floating

Floating

 

 

 

P0.3

Floating

Floating

 

 

 

P0.2

Floating

Floating

 

 

 

P0.1

Floating

Floating

 

 

 

P0.0

Floating

Floating

 

 

 

VCC

*+2.0~+6 [V]

*+2.0~+6 [V]

 

 

 

* VCC=+2.0~+6V when internal CPU data is held.

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Sonic Alert msm85c154hvs, msm83c154s, msm80154s user manual 166, CPU pin details ALF=1 in hard power down mode HPD