MAXQ Family User’s Guide:
MAXQ8913 Supplement
21-1
SECTION 21: TIMER/COUNTER B MODULE (SPECIFIC TO MAXQ8913)
The MAXQ8913 provides one Type B timer/counter module that operates as described in this section. Table 21-1 and
Table 21-2 list the associated pins and registers for these timer/counter modules.
Table 21-1. Type B Timer/Counter Input and Output Pins
Table 21-2. Type B Timer/Counter Control Registers
21.1 Timer/Counter B Register Descriptions
The following peripheral registers are used to control the LCD display controller. Addresses for all registers are given
as “Mx[yy],” where x is the module number (from 0 to 15 decimal) and yy is the register index (from 00h to 1Fh hexa-
decimal). Fields in the bit definition tables are defined as follows:
• Name: Symbolic names of bits or bit fields in this register.
• Reset: The value of each bit in this register following a standard reset. If this field reads “unchanged,” the given bit
is unaffected by standard reset. If this field reads “s,” the given bit does not have a fixed 0 or 1 reset value because
its value is determined by another internal state or external condition.
• POR: If present this field defines the value of each bit in this register following a power-on reset (as opposed to a
standard reset). Some bits are unaffected by standard resets and are set/cleared by POR only.
• Access: Bits can be read-only (r) or read/write (rw). Any special restrictions or conditions that could apply when
reading or writing this bit are detailed in the bit description.
21.1.1 Timer B Timer/Counter Capture/Reload Register (TBR, M2[07h])
Bits 15:0: Timer B Capture/Reload Register. This register is used to capture the TBV value when Timer B is config-
ured in capture mode. This register is also used as the 16-bit reload value when Timer B is configured in autoreload
mode.
TIMER/COUNTER FUNCTION PIN MULTIPLEXED WITH GPIO
TB0A: Timer B I/O Pin A K3 P1.2
TB0B: Timer B I/O Pin B L2 P1.3
REGISTER ADDRESS FUNCTION
TBR M2[07h]
Type B Timer/Counter Capture/Reload Register. Holds the reload value in autoreload mode; used
to store capture values in capture mode.
TBC M2[0Bh]
Type B Timer/Counter Compare Register. This register is used for comparison against the TBV
value when compare mode is enabled.
TBCN M2[06h] Type B Timer/Counter Control Register. Contains the control, mode, and interrupt bits.
TBV M2[0Ah] Type B Timer/Counter Value Register. Contains the current timer/counter value.
Bit #
15 14 13 12 11 10 9 8
Name TBR
Reset 0 0 0 0 0 0 0 0
Access rw rw rw rw rw rw rw rw
Bit #
7 6 5 4 3 2 1 0
Name TBR
Reset 0 0 0 0 0 0 0 0
Access rw rw rw rw rw rw rw rw
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