HD64F36912GFH Renesas Electronics America, HD64F36912GFH Datasheet - Page 201
HD64F36912GFH
Manufacturer Part Number
HD64F36912GFH
Description
IC H8 MCU FLASH 8K 32-QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300H Tinyr
Datasheet
1.DF36912GFHV.pdf
(442 pages)
Specifications of HD64F36912GFH
Core Processor
H8/300H
Core Size
16-Bit
Speed
12MHz
Connectivity
I²C, SCI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
18
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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12.3.7
TCNT is a 16-bit readable/writable up-counter. The clock source is selected by bits CKS2 to
CKS0 in TCRW. TCNT can be cleared to H'0000 through a compare match with GRA by setting
the CCLR in TCRW to 1. When TCNT overflows (changes from H'FFFF to H'0000), the OVF
flag in TSRW is set to 1. If OVIE in TIERW is set to 1 at this time, an interrupt request is
generated. TCNT must always be read or written in 16-bit units; 8-bit access is not allowed.
TCNT is initialized to H'0000 by a reset.
12.3.8
Each general register is a 16-bit readable/writable register that can function as either an output-
compare register or an input-capture register. The function is selected by settings in TIOR0 and
TIOR1.
When a general register is used as an input-compare register, its value is constantly compared with
the TCNT value. When the two values match (a compare match), the corresponding flag (IMFA,
IMFB, IMFC, or IMFD) in TSRW is set to 1. An interrupt request is generated at this time, when
IMIEA, IMIEB, IMIEC, or IMIED is set to 1. Compare match output can be selected in TIOR.
When a general register is used as an input-capture register, an external input-capture signal is
detected and the current TCNT value is stored in the general register. The corresponding flag
(IMFA, IMFB, IMFC, or IMFD) in TSRW is set to 1. If the corresponding interrupt-enable bit
(IMIEA, IMIEB, IMIEC, or IMIED) in TSRW is set to 1 at this time, an interrupt request is
generated. The edge of the input-capture signal is selected in TIOR.
GRC and GRD can be used as buffer registers of GRA and GRB, respectively, by setting BUFEA
and BUFEB in TMRW.
For example, when GRA is set as an output-compare register and GRC is set as the buffer register
for GRA, the value in the buffer register GRC is sent to GRA whenever compare match A is
generated.
When GRA is set as an input-capture register and GRC is set as the buffer register for GRA, the
value in TCNT is transferred to GRA and the value in the buffer register GRC is transferred to
GRA whenever an input capture is generated.
GRA to GRD must be written or read in 16-bit units; 8-bit access is not allowed. GRA to GRD are
initialized to H'FFFF by a reset.
Timer Counter (TCNT)
General Registers A to D (GRA to GRD)
Rev. 3.00 Sep. 14, 2006 Page 171 of 408
Section 12 Timer W
REJ09B0105-0300
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