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Chapter 20
Port Functions
User’s Manual U16580EE3V1UD00
(d) Port emergency shut off control register 5 (PESC5)
The PESC5 register is an 8-bit register that controls the emergency shut off behaviour of output
buffers of ports P51 to P56.
Writing to the PESC5 register is only possible in a specific sequence, where a write access to the
command register (PRCMD) must be made before a write access to the PESC5 register is
accepted. A read operation in between the two write operations is allowed, i.e. read-modify-write is
possible on register PESC5. For details refer to
3.4.8 ”Specific registers” on page 139
This register can be read or written in 8-bit or 1-bit units.
Reset input sets this register to 00H.
Figure 20-39:
Port Emergency Shut Off Control Register 5 (PESC5)
Caution:
State of the edge detection control bits ESO0ED1 and ESO0ED0 must not be
changed while ESO0EN is set (1). Otherwise the output shut off function may be
unintentionally triggered or a trigger event may be lost.
Remarks: 1.
The output buffers of ports P51 to P56 are forcibly disabled (high impedance output) as
long as ESO0EN and ESO0ST are set to 1.
2.
Setup of the emergency shut off function must be performed in the following sequence.
Otherwise the output shut off function may be unintentionally triggered or a trigger event
may be lost.
<1> power on (All registers are reset)
<2> PRCMD write (write protect released)
<3> clear ESO0EN bit to 0
<4> PRCMD write (write protect released)
<5> clear ESO0ST bit of ESOST5 register to 0
<6> PRCMD write (write protect released)
<7> set ESO0ED0, ESO0ED1 bits
<8> PRCMD write (write protect released)
<9> set ESO0EN bit to 1
After reset:
00H
R/W
Address:
FFFFF888H
7
6
5
4
3
2
1
0
PESC5
0
0
0
0
ESO0EN
0
ESO0ED1
ESO0EDO0
ESO0EN
Emergency Output Shut Off Enable Control
0
Emergency shut off control by ESO0 input disabled
1
Emergency shut off control by ESO0 input enabled
ESO0ED1 ESO0ED0
Valid Edge Specification of Emergency Shut Off Input (ESO0)
0
0
Falling edge
0
1
Rising edge
1
0
Low level
1
1
High level
Содержание MuPD70F3187
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Страница 192: ...192 Chapter 5 Memory Access Control Function μPD70F3187 only User s Manual U16580EE3V1UD00 MEMO ...
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Страница 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
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Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
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Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
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