MC9S08RD32DWE Freescale Semiconductor, MC9S08RD32DWE Datasheet - Page 132

• Manufacturer Part Number: MC9S08RD32DWE
• Description: IC MCU 32K FLASH 2K RAM 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HCS08r

Specifications of MC9S08RD32DWE

• Core Processor: HCS08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• Processor Series: S08RD
• Core: HCS08
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SCI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 39
• Number Of Timers: 2
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWS08
• Development Tools By Supplier: DEMO9S08RG60E
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Timer/PWM (TPM)
output compare, and edge-aligned PWM functions. The timer counter modulo registers,
TPM1MODH:TPM1MODL, control the modulo value of the counter. (The values $0000 or $FFFF
effectively make the counter free running.) Software can read the counter value at any time without
affecting the counting sequence. Any write to either byte of the TPM1CNT counter resets the counter
regardless of the data value written.
All TPM channels are programmable independently as input capture, output compare, or buffered
edge-aligned PWM channels.
10.4
Table 10-2
input, the associated TPM channel 0 can not use the pin. (Channel 0 can still be used in output compare
mode as a software timer.) When any of the pins associated with the timer is configured as a timer input,
a passive pullup can be enabled. After reset, the TPM modules are disabled and all pins default to
general-purpose inputs with the passive pullups disabled.
10.4.1
When control bits CLKSB:CLKSA in the timer status and control register are set to 1:1, the prescaler and
consequently the 16-bit counter for TPM1 are driven by an external clock source connected to the
TPM1CH0 pin. A synchronizer is needed between the external clock and the rest of the TPM. This
synchronizer is clocked by the bus clock so the frequency of the external source must be less than one-half
the frequency of the bus rate clock. The upper frequency limit for this external clock source is specified to
be one-fourth the bus frequency to conservatively accommodate duty cycle and phase-locked loop (PLL)
or frequency-locked loop (FLL) frequency jitter effects.
When the TPM is using the channel 0 pin for an external clock, the corresponding ELS0B:ELS0A control
bits should be set to 0:0 so channel 0 is not trying to use the same pin.
10.4.2
Each TPM channel is associated with an I/O pin on the MCU. The function of this pin depends on the
configuration of the channel. In some cases, no pin function is needed so the pin reverts to being controlled
by general-purpose I/O controls. When a timer has control of a port pin, the port data and data direction
registers do not affect the related pin(s). See the
about shared pin functions.
10.5
All TPM functions are associated with a main 16-bit counter that allows flexible selection of the clock
source and prescale divisor. A 16-bit modulo register also is associated with the main 16-bit counter in the
TPM. Each TPM channel is optionally associated with an MCU pin and a maskable interrupt function.
The TPM has center-aligned PWM capabilities controlled by the CPWMS control bit in TPM1SC. When
CPWMS is set to 1, timer counter TPM1CNT changes to an up-/down-counter and all channels in the
associated TPM act as center-aligned PWM channels. When CPWMS = 0, each channel can
132
Pin Descriptions
Functional Description
shows the MCU pins related to the TPM module. When TPM1CH0 is used as an external clock
External TPM Clock Sources
TPM1CHn — TPM1 Channel n I/O Pins
MC9S08RC/RD/RE/RG Data Sheet, Rev. 1.11
Pins and Connections
chapter for additional information
Freescale Semiconductor