M38504M6-XXXFP 데이터 시트보기 (PDF) - Renesas Electronics

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M38504M6-XXXFP

8-BIT CISC SINGLE-CHIP MICROCOMPUTER

Renesas Electronics 

APPENDIX

3.5 List of registers

Serial I/O1 status register

b7 b6 b5 b4 b3 b2 b1 b0

Serial I/O1 status register (SIOSTS: address 1916)

b

Name

Functions

At reset R W

0 Transmit buffer

0: Buffer full

empty flag (TBE) 1: Buffer empty

0

✕

1 Receive buffer full 0: Buffer empty

flag (RBF)

1: Buffer full

0

✕

2 Transmit shift

0: Transmit shift in progress 0

✕

register shift

1: Transmit shift completed

completion flag

(TSC)

3 Overrun error flag 0: No error

(OE)

1: Overrun error

0

✕

4 Parity error flag 0: No error

0

✕

(PE)

1: Parity error

5 Framing error flag 0: No error

(FE)

1: Framing error

0

✕

6 Summing error flag 0: (OE) U (PE) U (FE) = 0

0

✕

(SE)

1: (OE) U (PE) U (FE) = 1

7 Nothing is arranged for this bit. This bit is a

1

✕

write disabled bit. When this bit is read out, the

contents are “1”.

Fig. 3.5.7 Structure of Seial I/O1 status register

3850 Group (Spec. H) User’s Manual

3-53

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