CHAPTER 2 PIN FUNCTIONS
User’s Manual U12688EJ4V0UM00
48
Operating State
Pin
Reset
Software
STOP Mode
IDLE Mode
HALT Mode
Bus Hold
(TH)
Idle State
(TI)
SI0 to SI3
Operating
Operating
Operating
SO0 to SO3
Hi-Z
Hold
Hold
Operating
Operating
Operating
SCK0 to SCK3
Hi-Z
Hold (output)
(input)
Hold (output)
(input)
Operating
Operating
Operating
RXD0, RXD1
Operating
Operating
Operating
TXD0, TXD1
Hi-Z
Hold
Hold
Operating
Operating
Operating
ANI0 to ANI7, ADTRG
Operating
Operating
Operating
Notes 1. When in single-chip mode 0: Hi-Z
At other times: Operating
2. In the idle state (TI) just before and just after bus hold, H
Remark
Hi-Z: High-impedance
Hold: State during immediately preceding external bus cycle is held
H:
High-level output
L:
Low-level output
:
No sampling of input
Cautions when turning on/off power supply
The V850E/MS1 is configured with two power supply pins: the internal unit power supply pin (V
DD
) and the external
pin power supply pin (HV
DD
). If the voltage exceeds its operation guaranteed range, the input/output state of the I/O
pins may become undefined. If this input/output undefined state causes problems in the system, the pin status can be
made high impedance by taking the following countermeasures.
••••
When turning on the power
Apply 0 V to the HV
DD
pin until the voltage of the V
DD
pin is within the operation guaranteed range (3.0 to 3.6 V).
••••
When turning off the power
Apply a voltage within the operation guaranteed range (3.0 to 3.6 V) to the V
DD
pin until the voltage of the HV
DD
pin becomes 0 V.
V
DD
HV
DD
RESET (input)
Oscillation
stabilization time
3.0 V
3.0 V
0 V
0 V
Summary of Contents for V850E/MS1 UPD703100
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