DF2148RTE20IV Renesas Electronics America, DF2148RTE20IV Datasheet - Page 391

• Manufacturer Part Number: DF2148RTE20IV
• Description: MCU 5V 128K I-TEMP,PB-FREE, 100-
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148RTE20IV

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 74
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Each pair of registers for channel 0 and channel 1 comprises a 16-bit register with the upper 8 bits
for channel 0 and the lower 8 bits for channel 1, so they can be accessed together by word access.
(Access is not divided into two 8-bit accesses.)
In the H8S/2148 Group, certain of the channel X and channel Y registers are assigned to the same
address. The TMRX/Y bit in TCONRS determines which register is accessed.
12.2
12.2.1
Each TCNT is an 8-bit readable/writable up-counter.
TCNT0 and TCNT1 comprise a single 16-bit register, so they can be accessed together by word
access.
TCNT increments on pulses generated from an internal or external clock source. This clock source
is selected by clock select bits CKS2 to CKS0 in TCR.
TCNT can be cleared by an external reset input signal or compare-match signal. Counter clear bits
CCLR1 and CCLR0 in TCR select the method of clearing.
When TCNT overflows from H'FF to H'00, the overflow flag (OVF) in TCSR is set to 1.
The timer counters are initialized to H'00 by a reset and in hardware standby mode.
Bit
Initial value
Read/Write
TCNTX,TCNTY
Bit
Initial value
Read/Write
Register Descriptions
Timer Counter (TCNT)
R/W
15
0
R/W
7
0
R/W
14
0
R/W
13
0
R/W
6
0
R/W
12
TCNT0
0
R/W
11
0
R/W
5
0
R/W
10
0
R/W
9
0
R/W
4
0
R/W
8
0
Rev. 4.00 Sep 27, 2006 page 345 of 1130
R/W
7
0
R/W
3
0
R/W
6
0
R/W
5
0
R/W
2
0
R/W
TCNT1
4
0
Section 12 8-Bit Timers
R/W
3
0
R/W
REJ09B0327-0400
1
0
R/W
2
0
R/W
1
0
R/W
0
0
R/W
0
0