FUJITSU Semiconductor Controller MB89950/950A - Manual (Page 105)

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CHAPTER 4 I/O PORTS
Table 4.5-4 Port 3 pin state
Pin name
Normal operation
sleep mode
stop mode (SPL = "0")
Stop mode (SPL = "1") Reset
P30 to P33/V2 General-purpose I/O ports/bias input Hi-Z Hi-Z
SPL: Pin state specification bit in the standby control register (STBC)
Hi-Z: High impedance