DF3048BVX25V Renesas Electronics America, DF3048BVX25V Datasheet - Page 221

• Manufacturer Part Number: DF3048BVX25V
• Description: MCU 3/5V 128K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3048BVX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Contention between RTCOR Write and Compare Match
If a compare match occurs in the T
compare match signal is inhibited. See figure 7.22.
RTCNT Operation at Internal Clock Source Switchover
Switching internal clock sources may cause RTCNT to increment, depending on the switchover
timing. Table 7.9 shows the relation between the time of the switchover (by writing to bits CKS2
to CKS0) and the operation of RTCNT.
The RTCNT input clock is generated from the internal clock source by detecting the falling edge
of the internal clock. If a switchover is made from a high clock source to a low clock source, as in
case No. 3 in table 7.9, the switchover will be regarded as a falling edge, an RTCNT clock pulse
will be generated, and RTCNT will be incremented.
Figure 7.22 Contention between RTCOR Write and Compare Match
Address bus
Internal
write signal
RTCNT
RTCOR
Compare
match signal
3
state of an RTCOR write cycle, writing takes priority and the
RTCOR write cycle by CPU
T
1
RTCNT address
N
N
T
2
Rev. 3.00 Sep 27, 2006 page 193 of 872
RTCOR write data
T
3
Section 7 Refresh Controller
N + 1
Inhibited
M
REJ09B0325-0300