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III PERIPHERAL BLOCK: INPUT/OUTPUT PORTS
S1C33L03 FUNCTION PART EPSON B-III-9-11
A-1
B-III
I/O
CFEX0: P12, P14 function extension (D0) / Port function extension register (0x402DF)
CFEX1: P10, P11, P13 function extension (D1) / Port function extension register (0x402DF)
CFEX2: P21 function extension (D2) / Port function extension register (0x402DF)
CFEX3: P31 function extension (D3) / Port function extension register (0x402DF)
CFEX4: P04 function extension (D4) / Port function extension register (0x402DF)
CFEX5: P05 function extension (D5) / Port function extension register (0x402DF)
CFEX6: P06 function extension (D6) / Port function extension register (0x402DF)
CFEX7: P07 function extension (D7) / Port function extension register (0x402DF)
Sets whether the function of an I/O-port pin is to be extended.
Write "1": Function-extended pin
Write "0": I/O-port/peripheral-circuit pin
Read: Valid
When CFEXx is set to "1", the corresponding pin is set to the extended function input/output pin. When CFEXx =
"0", the corresponding CFP bit becomes effective.
At cold start, CFEX0 and CFEX1 are set to "1" (function-extended pin) and other bits are set to "0" (I/O-
port/peripheral-circuit pin). At hot start, CFEX retains its state from prior to the initial reset.