Z8F0813HJ005EG Zilog, Z8F0813HJ005EG Datasheet - Page 91

• Manufacturer Part Number: Z8F0813HJ005EG
• Description: IC Z8 ENCORE MCU FLASH 8K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F0813HJ005EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 5MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 28-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Other names: 269-4182; Z8F0813HJ005EG

Timer Control Register Definitions
BITS
FIELD
RESET
R/W
ADDR
BITS
FIELD
RESET
R/W
ADDR
PS025203-0405
Timer 0–1 High and Low Byte Registers
Timer Reload High and Low Byte Registers
R/W
R/W
0
0
7
7
The Timer 0–1 High and Low Byte (TxH and TxL) registers (Tables 49 and 39) contain
the current 16-bit timer count value. When the timer is enabled, a read from TxH causes
the value in TxL to be stored in a temporary holding register. A read from TxL always
returns this temporary register when the timers are enabled. When the timer is disabled,
reads from the TxL reads the register directly.
Writing to the Timer High and Low Byte registers while the timer is enabled is not recom-
mended. There are no temporary holding registers available for write operations, so simul-
taneous 16-bit writes are not possible. If either the Timer High or Low Byte registers are
written during counting, the 8-bit written value is placed in the counter (High or Low
Byte) at the next clock edge. The counter continues counting from the new value.
TH and TL—Timer High and Low Bytes
These 2 bytes, {TH[7:0], TL[7:0]}, contain the current 16-bit timer count value.
The Timer 0–1 Reload High and Low Byte (TxRH and TxRL) registers (Tables 51 and 41)
store a 16-bit reload value, {TRH[7:0], TRL[7:0]}. Values written to the Timer Reload
High Byte register are stored in a temporary holding register. When a write to the Timer
Reload Low Byte register occurs, the temporary holding register value is written to the
Timer High Byte register. This operation allows simultaneous updates of the 16-bit Timer
R/W
R/W
6
0
6
0
Table 49. Timer 0–1 High Byte Register (TxH)
Table 50. Timer 0–1 Low Byte Register (TxL)
R/W
R/W
5
0
5
0
P R E L I M I N A R Y
R/W
R/W
0
0
4
4
F00H, F08H
F01H, F09H
TH
TL
R/W
R/W
3
0
3
0
Z8 Encore!
R/W
R/W
0
0
2
2
Product Specification
®
R/W
R/W
1
0
1
0
Z8F0823 Series
R/W
R/W
0
1
0
0
Timers
74