H8SXSLASH1663R datasheet(251/1504 Pages) RENESAS

Il numero della parte	H8SX/1663R

Spiegazioni elettronici	Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

PDF	1504 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Section 9 Bus Controller (BSC)

Rev. 2.00 Sep. 24, 2008 Page 219 of 1468

REJ09B0412-0200

9.2.17

Refresh Timer Counter (RTCNT)

RTCNT counts up on the internal clock selected by bits RTCK2 to RTCK0 in REFCR.

When the RTCNT value matches the RTCOR value (compare match), the CMF flag in REFCR is

set to 1 and RTCNT is initialized to H'00. At this time, when the RFSHE bit in REFCR is set to 1,

a refresh cycle is generated. When the RFSHE bit is cleared to 0 and the CMIE bit in REFCR is

set to 1, a compare match interrupt (CMI) is generated.

Bit

Bit Name

Initial Value

R/W

9.2.18

Refresh Time Constant Register (RTCOR)

RTCOR specifies intervals at which a compare match for RTCOR and RTCNT is generated.

The RTCOR value is always compared with the RTCNT value. When they match, the CMF flag

in REFCR is set to 1 and RTCNT is initialized to H'00.

Bit

Bit Name

Initial Value

R/W

H8SX/1663R Scheda tecnica(PDF) 251 Page - Renesas Technology Corp