Toshiba TLCS-90 Series Data Book page 205

TOSHIBA
Pin Name
No. of
pins
3
CLK
1
EA 1
RESET
Xl/X2
2
Vcc
1
Vss(GND) 1
I/O
states
Output
Input
Input
Input/
Output
TMP90C840
Function
Clock output: Generates clock pulse at 1/4
frequency of clock oscillation. It is a
high-level while resetting.
External access: Connects with Vcc pin in
the TMP90C840 using internal ROM, and with
GND pin in the TMP90C841 with no internal
ROM.
Reset
Pin for quartz crystal oscillator
Power supply pin (+5V)
Ground pin (OV)
MPU90-7