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Chapter 30 I/O Ports
2.I/O Circuit Types
2. I/O Circuit Types
2.1 I/O Cell List MB91V460
Note: This table shows the I/O cells used for MB91V460. Please refer to the appropriate datasheet for I/O circuits
used on flash devices.
Note: The most I/O cells have programmable input levels (CH / AH [/ TTL]). About the programming, see section
Port Input Level Selection on page 498.
Note: For the programming of input pull-up or pull-down function, see section Programmable Pull-Up/Pull Down
Resistors on page 500.
2.2 I/O Input Voltages (VIL/VIH)
There are various types of input stages. The following table lists the input voltages VIL / VIH.
Type
Input
Analog
Line
Output
Driver
Comment
Pull Up / Down
(50 kOhm)
CMOS (C)
CMOS Hysteresis (CH)
Automotive (AH)
Input Stop
TP00_0 Up/Down switch CH / AH switch Stop - 4 mA -
TP01_0 - CH / AH switch Stop In/Out 4 mA ADC / DAC
TP02_0 - CH / AH switch Stop - 3 mA I2C
TP03_0 Up/Down switch CH / AH switch Stop Input 4 mA AN
TP04_0 Up/Down switch CH / AH / TTL Switch Stop - 4 mA External Bus
TP05_0 - CH / AH switch Stop Input 30 mA SMC / ADC
TP06_0 - CH / AH switch Stop - 4 mA LCD COM / SEG
TP07_0 - CH / AH switch Stop In/Out 4 mA LCD V0 / V1 / V2
TP08_0 - CH / AH switch Stop In/Out 4 mA LCD V3
TC00_0 - CCH - - - HSTX
TC01_0 Up CCH - - -
RSTX / NMIX
EBREAKX
TC02_0 Up CCH - - - INITX
TC02_1 - CCH - - - MD
TC10_0 - - - - 8 mA MONCLK
TO00_0 - - Stop - - 4 MHz Oscillator
TO00_1 - - Stop - - 4 MHz Oscillator
TO01_0 - - Stop - - 32 kHz Oscillator
TO01_1 - - Stop - - 32 kHz Oscillator
TA02_0 - - - Input - ALARM
Type Description VIL VIH
C CMOS input 0.25 x VDD 0.65 x VDD
CH CMOS Hysteresis Trigger input (I/O Port) 0.3 x VDD 0.7 x VDD
CCH CMOS Hysteresis Trigger input (Control) 0.2 x VDD 0.8 x VDD
AH CMOS Automotive Hysteresis Trigger input 0.5 x VDD 0.8 x VDD
TTL TTL Input 0.8 V 2.1 V