Competition Between Writing And Comparing Match With The Ocr - Hitachi H8S/2199 Hardware Manual

16.7.3

Competition between Writing and Comparing Match with the OCR

When a comparing match occurs under the T2 state where the OCRA and OCRB are under the
writing cycle, the priority will be given to writing of the OCR and the comparing match signal will
be prohibited.
Figure 16.15 shows the timing chart.
Internal writing
Comparing match
Figure 16.15 Competition between Writing and Comparing Match with the OCR
Rev. 1.0, 02/00, page 344 of 1141
Writing cycle with the OCR
φ
Address
signal
FRC
OCR
signal
T1 T2
OCR address
N
N
Writing data
N+1
M
Will be prohibited