Renesas HD64F2111B Manual De Usuario

Rev. 1.00, 05/04, page 352 of 544 

 

3 

KBIE 

0 

R/W 

Keyboard Interrupt Enable 

Enables or disables interrupts from the keyboard buffer 
controller to the CPU. 

0: Interrupt requests are disabled 

1: Interrupt requests are enabled 

2 KBF  0  R/(W)* 

Keyboard Buffer Register Full 

Indicates that data reception has been completed and 
the received data is in KBBR. 

0: [Clearing condition] 

Read KBF when KBF =1, then write 0 in KBF 

1: [Setting conditions] 

•  When data has been received normally and has 

been transferred to KBBR while KBFSEL = 1 

(keyboard buffer register full flag) 

•  When a KCLK falling edge is detected while 

KBFSEL = 0 (KCLK interrupt flag) 

1 PER  0  R/(W)* Parity 

Error 

Indicates that an odd parity error has occurred. 

0: [Clearing condition] 

Read PER when PER =1, then write 0 in PER 

1: [Setting condition] 

When an odd parity error occurs 

0 KBS  0  R  Keyboard 

Stop 

Indicates the receive data stop bit. Valid only when 
KBF = 1. 

0: 0 stop bit received 

1: 1 stop bit received 

Note:  *  Only 0 can be written for clearing the flag.