HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 296

• Manufacturer Part Number: HD64F7051SFJ20V
• Description: MCU 5V 256K J-TEMP PB-FREE QFP-1
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7050r

Specifications of HD64F7051SFJ20V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, WDT
• Number Of I /o: 102
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 168-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 10 Advanced Timer Unit (ATU)
10.2.12 Free-Running Counters (TCNT)
The free-running counters (TCNT) are 32- or 16-bit up-counters. The ATU has ten TCNT
counters: one 32-bit TCNT in channel 0, and one 16-bit TCNT in each of channels 1 to 9.
Channel
0
1
2
3
4
5
6
7
8
9
Free-Running Counter 0H, L (TCNT0H, TCNT0L): Free-running counter 0 (comprising
TCNT0H and TCNT0L) is a 32-bit readable/writable register that counts on an input clock. The
input clock is selected with prescaler register 1 (PSCR1).
When TCNT0 overflows (from H'FFFFFFFF to H'00000000), the OVF0 overflow flag in the
timer status register (TSR) is set to 1.
TCNT0 is connected to the CPU via an internal 16-bit bus, and can only be accessed by a
longword read or write. Word reads or writes cannot be used..
Rev. 5.00 Jan 06, 2006 page 274 of 818
REJ09B0273-0500
Initial value:
Initial value:
R/W: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
R/W: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
Bit:
Bit:
Abbreviation
TCNT0H,
TCNT0L
TCNT1
TCNT2
TCNT3
TCNT4
TCNT5
TCNT6
TCNT7
TCNT8
TCNT9
31
15
0
0
30
14
0
0
29
13
0
0
28
12
0
0
Description
32-bit up-counter (initial value H'00000000)
16-bit up-counters (initial value H'0000)
16-bit up-counters (initial value H'0001)
27
11
0
0
26
10
0
0
25
0
9
0
24
0
8
0
23
0
7
0
22
0
6
0
21
0
5
0
20
0
4
0
19
0
3
0
18
0
2
0
17
0
1
0
16
0
0
0