SH7018 Datasheet, PDF (25/431 Pages) Renesas Technology Corp – SuperH™ RISC engine

Table 1.2 Pin Functions (cont)
Type
Abbreviation I/O
Name
Function
A/D converter
AV_CC
Input
Analog power
supply
Connect to V_CC potential when
using an analog power supply.
AV_SS
Input
Analog ground
Connect to V_ss potential when
using an analog power supply.
AN0 to AN7 Input Analog inputs
Analog signal input terminals.
I/O ports
PA15, 14,
12 to 0
Input/ General port
output
General I/O port pins. I/O can be
specified one bit at a time.
PB9 to 0
Input/ General port
output
General I/O port pins. I/O can be
specified one bit at a time.
PC15 to 0
Input/ General port
output
General I/O port pins. I/O can be
specified one bit at a time.
PD7 to 0
Input/ General port
output
General I/O port pins. I/O can be
specified one bit at a time.
PE14 to 4, 2, 0 Input/ General port
output
General I/O port pins. I/O can be
specified one bit at a time.
PF7 to 0
Input General port
General I/O port pins.
Note:
The following power-on/power-off order is recommended.
1. Powering on
(1) Turn on the 5 V power (PV_CC) first, then the 3 V power (V_CC, PLLV_CC, AV_CC).
(2) Pin states are undefined while only 5 V power is on, as reset input is invalid.
2. Powering off
(1) Power off in the reverse order to powering on: turn off the 3 V power first, then the 5
V power.
(2) Pin states are undefined while only 5 V power is being supplied.
3. Power-on/off interval
To minimize the length of time during which pin states are undefined, the power-on/off
interval should be kept as short as possible. Also, the system design should ensure that
erroneous system operation will not result from pin states becoming undefined.
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