INTERNAL SPECIFICATIONS

Table 4-26 CPU pin details (ALF=0) in hard power down mode (HPD)

 

 

 

Name

Internal ROM

External ROM

 

P1.0/T2

Port data output

Port data output

 

 

 

 

 

P1.1/T2EX

Port data output

Port data output

 

 

 

 

 

P1.2

Port data output

Port data output

 

 

 

 

 

P1.3

Port data output

Port data output

 

 

 

 

 

P1.4

Port data output

Port data output

 

 

 

 

 

P1.5

Port data output

Port data output

 

 

 

 

 

P1.6

Port data output

Port data output

 

 

 

 

 

P1.7

Port data output

Port data output

 

 

 

 

 

RESET

“0” level input

“0” level input

 

 

 

 

 

P3.0/RXD

Port data output

Port data output

 

 

 

 

 

P3.1/TXD

Port data output

Port data output

 

 

 

 

 

P3.2/ INT0

Port data output

Port data output

 

 

 

 

 

P3.3/ INT1

Port data output

Port data output

 

 

 

 

 

P3.4/ T0

Port data output

Port data output

 

 

 

 

 

P3.5/ T1/HPDI

“0” level input

“0” level input

 

 

 

 

 

P3.6/ WR

Port data output

Port data output

 

 

 

 

 

P3.7/ RD

Port data output

Port data output

 

 

 

 

 

XTAL 2

Oscillator operative

Oscillator operative

 

 

 

 

 

XTAL 1

Oscillator operative

Oscillator operative

 

 

 

 

 

VSS

0 [V]

0 [V]

 

 

 

 

 

P2.0

Port data output

Port data output

 

 

 

 

 

P2.1

Port data output

Port data output

 

 

 

 

 

P2.2

Port data output

Port data output

 

 

 

 

 

P2.3

Port data output

Port data output

 

 

 

 

 

P2.4

Port data output

Port data output

 

 

 

 

 

P2.5

Port data output

Port data output

 

 

 

 

 

P2.6

Port data output

Port data output

 

 

 

 

 

P2.7

Port data output

Port data output

 

 

 

 

 

PSEN

“0” level output

“0” level output

 

 

 

 

 

ALE

“0” level output

“0” level output

 

 

 

 

 

EA

“1” level input

“0” level input

 

 

 

 

 

P0.7

Port data output

Floating

 

 

 

 

 

P0.6

Port data output

Floating

 

 

 

 

 

P0.5

Port data output

Floating

 

 

 

 

 

P0.4

Port data output

Floating

 

 

 

 

 

P0.3

Port data output

Floating

 

 

 

 

 

P0.2

Port data output

Floating

 

 

 

 

 

P0.1

Port data output

Floating

 

 

 

 

 

P0.0

Port data output

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 163, CPU pin details ALF=0 in hard power down mode HPD